diff --git a/autogpt_platform/backend/backend/copilot/baseline/reasoning.py b/autogpt_platform/backend/backend/copilot/baseline/reasoning.py
index 15a77dde8a..0c689ed4a7 100644
--- a/autogpt_platform/backend/backend/copilot/baseline/reasoning.py
+++ b/autogpt_platform/backend/backend/copilot/baseline/reasoning.py
@@ -1,7 +1,8 @@
 """Extended-thinking wire support for the baseline (OpenRouter) path.
 
-Anthropic routes on OpenRouter expose extended thinking through
-non-OpenAI extension fields that the OpenAI Python SDK doesn't model:
+OpenRouter routes that support extended thinking (Anthropic Claude and
+Moonshot Kimi today) expose reasoning through non-OpenAI extension fields
+that the OpenAI Python SDK doesn't model:
 
 * ``reasoning`` (legacy string) — enabled by ``include_reasoning: true``.
 * ``reasoning_content`` — DeepSeek / some OpenRouter routes.
@@ -17,12 +18,14 @@ This module keeps the wire-level concerns in one place:
   one streaming round and emits ``StreamReasoning*`` events so the caller
   only has to plumb the events into its pending queue.
 * :func:`reasoning_extra_body` builds the ``extra_body`` fragment for the
-  OpenAI client call.  Returns ``None`` on non-Anthropic routes.
+  OpenAI client call.  Returns ``None`` for routes without reasoning
+  support (see :func:`_is_reasoning_route`).
 """
 
 from __future__ import annotations
 
 import logging
+import time
 import uuid
 from typing import Any
 
@@ -42,6 +45,19 @@ logger = logging.getLogger(__name__)
 
 _VISIBLE_REASONING_TYPES = frozenset({"reasoning.text", "reasoning.summary"})
 
+# Coalescing thresholds for ``StreamReasoningDelta`` emission.  OpenRouter's
+# Kimi K2.6 endpoint tokenises reasoning at a much finer grain than Anthropic
+# (~4,700 deltas per turn in one observed session, vs ~28 for Sonnet); without
+# coalescing, every chunk is one Redis ``xadd`` + one SSE frame + one React
+# re-render of the non-virtualised chat list, which paint-storms the browser
+# main thread and freezes the UI.  Batching into ~32-char / ~40 ms windows
+# cuts the event rate ~100x while staying snappy enough that the Reasoning
+# collapse still feels live (well under the ~100 ms perceptual threshold).
+# Per-delta persistence to ``session.messages`` stays granular — we only
+# coalesce the *wire* emission.
+_COALESCE_MIN_CHARS = 32
+_COALESCE_MAX_INTERVAL_MS = 40.0
+
 
 class ReasoningDetail(BaseModel):
     """One entry in OpenRouter's ``reasoning_details`` list.
@@ -132,18 +148,72 @@ class OpenRouterDeltaExtension(BaseModel):
         return "".join(d.visible_text for d in self.reasoning_details)
 
 
+def _is_reasoning_route(model: str) -> bool:
+    """Return True when the route supports OpenRouter's ``reasoning`` extension.
+
+    OpenRouter exposes reasoning tokens via a unified ``reasoning`` request
+    param that works on any provider that supports extended thinking —
+    currently Anthropic (Claude Opus / Sonnet) and Moonshot (Kimi K2.6 +
+    kimi-k2-thinking) advertise it in their ``supported_parameters``.
+    Other providers silently drop the field, but we skip it anyway to keep
+    the payload tight and avoid confusing cache diagnostics.
+
+    Kept separate from :func:`backend.copilot.baseline.service._is_anthropic_model`
+    because ``cache_control`` is strictly Anthropic-specific (Moonshot does
+    its own auto-caching), so the two gates must not conflate.
+
+    Both the Claude and Kimi matches are anchored to the provider
+    prefix (or to a bare model id with no prefix at all) to avoid
+    substring false positives — a custom ``some-other-provider/claude-mock``
+    or ``provider/hakimi-large`` configured via
+    ``CHAT_FAST_STANDARD_MODEL`` must NOT inherit the reasoning
+    extra_body and take a 400 from its upstream.  Recognised shapes:
+
+    * Claude — ``anthropic/`` or ``anthropic.`` provider prefix, or a
+      bare ``claude-`` model id with no provider prefix
+      (``claude-opus-4.7``, ``anthropic/claude-sonnet-4-6``,
+      ``anthropic.claude-3-5-sonnet``).  A non-Anthropic prefix like
+      ``someprovider/claude-mock`` is rejected on purpose.
+    * Kimi — ``moonshotai/`` provider prefix, or a ``kimi-`` model id
+      with no provider prefix (``kimi-k2.6``,
+      ``moonshotai/kimi-k2-thinking``).  Like Claude, a non-Moonshot
+      prefix is rejected — exception: ``openrouter/kimi-k2.6`` stays
+      recognised because ``openrouter/`` is how we route to Moonshot
+      today and changing that would be a behaviour regression for
+      existing deployments.
+    """
+    lowered = model.lower()
+    if lowered.startswith(("anthropic/", "anthropic.")):
+        return True
+    if lowered.startswith("moonshotai/"):
+        return True
+    # ``openrouter/`` historically routes to whatever the default
+    # upstream for the model is — for kimi that's Moonshot, so accept
+    # ``openrouter/kimi-...`` here.  Other ``openrouter/`` models
+    # (e.g. ``openrouter/auto``) fall through to the no-prefix check
+    # below and are rejected unless they start with ``claude-`` /
+    # ``kimi-`` after the slash, which no real OpenRouter route does.
+    if lowered.startswith("openrouter/kimi-"):
+        return True
+    if "/" in lowered:
+        # Any other provider prefix is a custom / non-Anthropic /
+        # non-Moonshot route and must not opt into reasoning.  This
+        # blocks substring false positives like
+        # ``some-provider/claude-mock-v1`` or ``other/kimi-pro``.
+        return False
+    # No provider prefix — accept bare ``claude-*`` and ``kimi-*`` ids
+    # so direct CLI configs (``claude-3-5-sonnet-20241022``,
+    # ``kimi-k2-instruct``) keep working.
+    return lowered.startswith("claude-") or lowered.startswith("kimi-")
+
+
 def reasoning_extra_body(model: str, max_thinking_tokens: int) -> dict[str, Any] | None:
     """Build the ``extra_body["reasoning"]`` fragment for the OpenAI client.
 
-    Returns ``None`` for non-Anthropic routes (other OpenRouter providers
-    ignore the field but we skip it anyway to keep the payload minimal)
-    and for ``max_thinking_tokens <= 0`` (operator kill switch).
+    Returns ``None`` for non-reasoning routes and for
+    ``max_thinking_tokens <= 0`` (operator kill switch).
     """
-    # Imported lazily to avoid pulling service.py at module load — service.py
-    # imports this module, and the lazy import keeps the dependency one-way.
-    from backend.copilot.baseline.service import _is_anthropic_model
-
-    if not _is_anthropic_model(model) or max_thinking_tokens <= 0:
+    if not _is_reasoning_route(model) or max_thinking_tokens <= 0:
         return None
     return {"reasoning": {"max_tokens": max_thinking_tokens}}
 
@@ -177,11 +247,24 @@ class BaselineReasoningEmitter:
     def __init__(
         self,
         session_messages: list[ChatMessage] | None = None,
+        *,
+        coalesce_min_chars: int = _COALESCE_MIN_CHARS,
+        coalesce_max_interval_ms: float = _COALESCE_MAX_INTERVAL_MS,
     ) -> None:
         self._block_id: str = str(uuid.uuid4())
         self._open: bool = False
         self._session_messages = session_messages
         self._current_row: ChatMessage | None = None
+        # Coalescing state — ``_pending_delta`` accumulates reasoning text
+        # between wire flushes.  Providers like Kimi K2.6 emit very fine-
+        # grained chunks; batching them reduces Redis ``xadd`` + SSE + React
+        # re-render load by ~100x for equivalent text output.  Tuning knobs
+        # are kwargs so tests can disable coalescing (``=0``) for
+        # deterministic event assertions.
+        self._coalesce_min_chars = coalesce_min_chars
+        self._coalesce_max_interval_ms = coalesce_max_interval_ms
+        self._pending_delta: str = ""
+        self._last_flush_monotonic: float = 0.0
 
     @property
     def is_open(self) -> bool:
@@ -192,39 +275,86 @@ class BaselineReasoningEmitter:
 
         Empty list when the chunk carries no reasoning payload, so this is
         safe to call on every chunk without guarding at the call site.
-        Persistence (when a session message list is attached) happens in
-        lockstep with emission so the row's content stays equal to the
-        concatenated deltas at every delta boundary.
+
+        Persistence (when a session message list is attached) stays
+        per-delta so the DB row's content always equals the concatenation
+        of wire deltas at every chunk boundary, independent of the
+        coalescing window.  Only the wire emission is batched.
         """
         ext = OpenRouterDeltaExtension.from_delta(delta)
         text = ext.visible_text()
         if not text:
             return []
         events: list[StreamBaseResponse] = []
+        # First reasoning text in this block — emit Start + the first Delta
+        # atomically so the frontend Reasoning collapse renders immediately
+        # rather than waiting for the coalesce window to elapse.  Subsequent
+        # chunks buffer into ``_pending_delta`` and only flush when the
+        # char/time thresholds trip.
+        # Sample the monotonic clock exactly once per chunk — at ~4,700
+        # chunks per turn, folding the two calls into one cuts ~4,700
+        # syscalls off the hot path without changing semantics.
+        now = time.monotonic()
         if not self._open:
             events.append(StreamReasoningStart(id=self._block_id))
+            events.append(StreamReasoningDelta(id=self._block_id, delta=text))
             self._open = True
+            self._last_flush_monotonic = now
             if self._session_messages is not None:
-                self._current_row = ChatMessage(role="reasoning", content="")
+                self._current_row = ChatMessage(role="reasoning", content=text)
                 self._session_messages.append(self._current_row)
-        events.append(StreamReasoningDelta(id=self._block_id, delta=text))
+            return events
+
+        # Persist per-delta (no coalescing here — the session snapshot stays
+        # consistent at every chunk boundary, independent of the wire
+        # coalesce window).
         if self._current_row is not None:
             self._current_row.content = (self._current_row.content or "") + text
+
+        self._pending_delta += text
+        if self._should_flush_pending(now):
+            events.append(
+                StreamReasoningDelta(id=self._block_id, delta=self._pending_delta)
+            )
+            self._pending_delta = ""
+            self._last_flush_monotonic = now
         return events
 
+    def _should_flush_pending(self, now: float) -> bool:
+        """Return True when the accumulated delta should be emitted now.
+
+        *now* is the monotonic timestamp sampled by the caller so the
+        clock is read at most once per chunk (the flush-timestamp update
+        reuses the same value).
+        """
+        if not self._pending_delta:
+            return False
+        if len(self._pending_delta) >= self._coalesce_min_chars:
+            return True
+        elapsed_ms = (now - self._last_flush_monotonic) * 1000.0
+        return elapsed_ms >= self._coalesce_max_interval_ms
+
     def close(self) -> list[StreamBaseResponse]:
         """Emit ``StreamReasoningEnd`` for the open block (if any) and rotate.
 
-        Idempotent — returns ``[]`` when no block is open.  The id rotation
-        guarantees the next reasoning block starts with a fresh id rather
-        than reusing one already closed on the wire.  The persisted row is
-        not removed — it stays in ``session_messages`` as the durable
-        record of what was reasoned.
+        Idempotent — returns ``[]`` when no block is open.  Drains any
+        still-buffered delta first so the frontend never loses tail text
+        from the coalesce window.  The id rotation guarantees the next
+        reasoning block starts with a fresh id rather than reusing one
+        already closed on the wire.  The persisted row is not removed —
+        it stays in ``session_messages`` as the durable record of what
+        was reasoned.
         """
         if not self._open:
             return []
-        event = StreamReasoningEnd(id=self._block_id)
+        events: list[StreamBaseResponse] = []
+        if self._pending_delta:
+            events.append(
+                StreamReasoningDelta(id=self._block_id, delta=self._pending_delta)
+            )
+            self._pending_delta = ""
+        events.append(StreamReasoningEnd(id=self._block_id))
         self._open = False
         self._block_id = str(uuid.uuid4())
         self._current_row = None
-        return [event]
+        return events
diff --git a/autogpt_platform/backend/backend/copilot/baseline/reasoning_test.py b/autogpt_platform/backend/backend/copilot/baseline/reasoning_test.py
index df64086d5f..e18c8066e4 100644
--- a/autogpt_platform/backend/backend/copilot/baseline/reasoning_test.py
+++ b/autogpt_platform/backend/backend/copilot/baseline/reasoning_test.py
@@ -12,6 +12,7 @@ from backend.copilot.baseline.reasoning import (
     BaselineReasoningEmitter,
     OpenRouterDeltaExtension,
     ReasoningDetail,
+    _is_reasoning_route,
     reasoning_extra_body,
 )
 from backend.copilot.model import ChatMessage
@@ -135,6 +136,59 @@ class TestOpenRouterDeltaExtension:
         assert ext.visible_text() == "real"
 
 
+class TestIsReasoningRoute:
+    def test_anthropic_routes(self):
+        assert _is_reasoning_route("anthropic/claude-sonnet-4-6")
+        assert _is_reasoning_route("claude-3-5-sonnet-20241022")
+        assert _is_reasoning_route("anthropic.claude-3-5-sonnet")
+        assert _is_reasoning_route("ANTHROPIC/Claude-Opus")  # case-insensitive
+
+    def test_moonshot_kimi_routes(self):
+        # OpenRouter advertises the ``reasoning`` extension on Moonshot
+        # endpoints — both K2.6 (the new baseline default) and the
+        # reasoning-native kimi-k2-thinking variant.
+        assert _is_reasoning_route("moonshotai/kimi-k2.6")
+        assert _is_reasoning_route("moonshotai/kimi-k2-thinking")
+        assert _is_reasoning_route("moonshotai/kimi-k2.5")
+        # Direct (non-OpenRouter) model ids also resolve via the ``kimi-``
+        # prefix so a future bare ``kimi-k3`` id would still match.
+        assert _is_reasoning_route("kimi-k2-instruct")
+        # Provider-prefixed bare kimi ids (without the ``moonshotai/``
+        # prefix) are also recognised — the match anchors on the final
+        # path segment.
+        assert _is_reasoning_route("openrouter/kimi-k2.6")
+
+    def test_other_providers_rejected(self):
+        assert not _is_reasoning_route("openai/gpt-4o")
+        assert not _is_reasoning_route("google/gemini-2.5-pro")
+        assert not _is_reasoning_route("xai/grok-4")
+        assert not _is_reasoning_route("meta-llama/llama-3.3-70b-instruct")
+        assert not _is_reasoning_route("deepseek/deepseek-r1")
+
+    def test_kimi_substring_false_positives_rejected(self):
+        # Regression: the previous implementation matched any model whose
+        # name contained the substring ``kimi`` — including unrelated model
+        # ids like ``hakimi``.  The anchored match below rejects them.
+        assert not _is_reasoning_route("some-provider/hakimi-large")
+        assert not _is_reasoning_route("hakimi")
+        assert not _is_reasoning_route("akimi-7b")
+
+    def test_claude_substring_false_positives_rejected(self):
+        # Regression (Sentry review on #12871): ``'claude' in lowered``
+        # matched any substring — a custom
+        # ``someprovider/claude-mock-v1`` set via
+        # ``CHAT_FAST_STANDARD_MODEL`` would inherit the reasoning
+        # extra_body and take a 400 from its upstream.  The anchored
+        # match requires either an ``anthropic`` / ``anthropic.`` /
+        # ``anthropic/`` prefix, or a bare ``claude-`` id with no
+        # provider prefix.
+        assert not _is_reasoning_route("someprovider/claude-mock-v1")
+        assert not _is_reasoning_route("custom/claude-like-model")
+        # Same principle for Kimi — a non-Moonshot provider prefix is
+        # rejected even when the model id starts with ``kimi-``.
+        assert not _is_reasoning_route("other/kimi-pro")
+
+
 class TestReasoningExtraBody:
     def test_anthropic_route_returns_fragment(self):
         assert reasoning_extra_body("anthropic/claude-sonnet-4-6", 4096) == {
@@ -146,16 +200,30 @@ class TestReasoningExtraBody:
             "reasoning": {"max_tokens": 2048}
         }
 
-    def test_non_anthropic_route_returns_none(self):
+    def test_kimi_routes_return_fragment(self):
+        # Kimi K2.6 ships the same OpenRouter ``reasoning`` extension as
+        # Anthropic, so the gate widened with this PR and the fragment
+        # must now materialise on Moonshot routes too.
+        assert reasoning_extra_body("moonshotai/kimi-k2.6", 8192) == {
+            "reasoning": {"max_tokens": 8192}
+        }
+        assert reasoning_extra_body("moonshotai/kimi-k2-thinking", 4096) == {
+            "reasoning": {"max_tokens": 4096}
+        }
+
+    def test_non_reasoning_route_returns_none(self):
         assert reasoning_extra_body("openai/gpt-4o", 4096) is None
         assert reasoning_extra_body("google/gemini-2.5-pro", 4096) is None
+        assert reasoning_extra_body("xai/grok-4", 4096) is None
 
     def test_zero_max_tokens_kill_switch(self):
         # Operator kill switch: ``max_thinking_tokens <= 0`` disables the
-        # ``reasoning`` extra_body fragment even on an Anthropic route.
-        # Lets us silence reasoning without dropping the SDK path's budget.
+        # ``reasoning`` extra_body fragment on ANY reasoning route (Anthropic
+        # or Kimi).  Lets us silence reasoning without dropping the SDK
+        # path's budget.
         assert reasoning_extra_body("anthropic/claude-sonnet-4-6", 0) is None
         assert reasoning_extra_body("anthropic/claude-sonnet-4-6", -1) is None
+        assert reasoning_extra_body("moonshotai/kimi-k2.6", 0) is None
 
 
 class TestBaselineReasoningEmitter:
@@ -171,7 +239,12 @@ class TestBaselineReasoningEmitter:
         assert emitter.is_open is True
 
     def test_subsequent_deltas_reuse_block_id_without_new_start(self):
-        emitter = BaselineReasoningEmitter()
+        # Disable coalescing so each chunk flushes immediately — this test
+        # is about the Start/Delta/block-id state machine, not the coalesce
+        # window.  Coalescing behaviour is covered below.
+        emitter = BaselineReasoningEmitter(
+            coalesce_min_chars=0, coalesce_max_interval_ms=0
+        )
         first = emitter.on_delta(_delta(reasoning="a"))
         second = emitter.on_delta(_delta(reasoning="b"))
 
@@ -226,6 +299,106 @@ class TestBaselineReasoningEmitter:
         assert deltas[0].delta == "plan: do the thing"
 
 
+class TestReasoningDeltaCoalescing:
+    """Coalescing batches fine-grained provider chunks into bigger wire
+    frames.  OpenRouter's Kimi K2.6 emits ~4,700 reasoning-delta chunks
+    per turn vs ~28 for Sonnet; without batching, every chunk becomes one
+    Redis ``xadd`` + one SSE event + one React re-render of the
+    non-virtualised chat list, which paint-storms the browser.  These
+    tests pin the batching contract: small chunks buffer until the
+    char-size or time threshold trips, large chunks still flush
+    immediately, and ``close()`` never drops tail text."""
+
+    def test_small_chunks_after_first_buffer_until_threshold(self):
+        # Generous time threshold so size alone controls flush timing.
+        emitter = BaselineReasoningEmitter(
+            coalesce_min_chars=32, coalesce_max_interval_ms=60_000
+        )
+        # First chunk always flushes immediately (so UI renders without
+        # waiting).
+        first = emitter.on_delta(_delta(reasoning="hi "))
+        assert any(isinstance(e, StreamReasoningStart) for e in first)
+        assert sum(isinstance(e, StreamReasoningDelta) for e in first) == 1
+
+        # Subsequent small chunks buffer silently — 5 × 4 chars = 20 chars,
+        # still under the 32-char threshold.
+        for _ in range(5):
+            assert emitter.on_delta(_delta(reasoning="abcd")) == []
+
+        # Once the threshold is crossed, the accumulated buffer flushes
+        # as a single StreamReasoningDelta carrying every buffered chunk.
+        flush = emitter.on_delta(_delta(reasoning="efghijklmnop"))
+        assert len(flush) == 1
+        assert isinstance(flush[0], StreamReasoningDelta)
+        assert flush[0].delta == "abcd" * 5 + "efghijklmnop"
+
+    def test_time_based_flush_when_chars_stay_below_threshold(self, monkeypatch):
+        # Fake ``time.monotonic`` so we can drive the time-based branch
+        # deterministically without real sleeps.
+        from backend.copilot.baseline import reasoning as rmod
+
+        fake_now = [0.0]
+        monkeypatch.setattr(rmod.time, "monotonic", lambda: fake_now[0])
+
+        emitter = BaselineReasoningEmitter(
+            coalesce_min_chars=1000, coalesce_max_interval_ms=40
+        )
+        # t=0: first chunk flushes immediately.
+        first = emitter.on_delta(_delta(reasoning="a"))
+        assert sum(isinstance(e, StreamReasoningDelta) for e in first) == 1
+
+        # t=10 ms: still under 40 ms → buffer.
+        fake_now[0] = 0.010
+        assert emitter.on_delta(_delta(reasoning="b")) == []
+
+        # t=50 ms since last flush → time threshold trips, flush fires.
+        fake_now[0] = 0.060
+        flushed = emitter.on_delta(_delta(reasoning="c"))
+        assert len(flushed) == 1
+        assert isinstance(flushed[0], StreamReasoningDelta)
+        assert flushed[0].delta == "bc"
+
+    def test_close_flushes_tail_buffer_before_end(self):
+        emitter = BaselineReasoningEmitter(
+            coalesce_min_chars=1000, coalesce_max_interval_ms=60_000
+        )
+        emitter.on_delta(_delta(reasoning="first"))  # flushes (first chunk)
+        emitter.on_delta(_delta(reasoning=" middle "))  # buffered
+        emitter.on_delta(_delta(reasoning="tail"))  # buffered
+
+        events = emitter.close()
+        assert len(events) == 2
+        assert isinstance(events[0], StreamReasoningDelta)
+        assert events[0].delta == " middle tail"
+        assert isinstance(events[1], StreamReasoningEnd)
+
+    def test_coalesce_disabled_flushes_every_chunk(self):
+        emitter = BaselineReasoningEmitter(
+            coalesce_min_chars=0, coalesce_max_interval_ms=0
+        )
+        first = emitter.on_delta(_delta(reasoning="a"))
+        second = emitter.on_delta(_delta(reasoning="b"))
+        assert sum(isinstance(e, StreamReasoningDelta) for e in first) == 1
+        assert sum(isinstance(e, StreamReasoningDelta) for e in second) == 1
+
+    def test_persistence_stays_per_delta_even_when_wire_coalesces(self):
+        """DB row content must track every chunk so a crash mid-turn
+        persists the full reasoning-so-far, even if the coalesce window
+        never flushed those chunks to the wire."""
+        session: list[ChatMessage] = []
+        emitter = BaselineReasoningEmitter(
+            session,
+            coalesce_min_chars=1000,
+            coalesce_max_interval_ms=60_000,
+        )
+        emitter.on_delta(_delta(reasoning="first "))
+        emitter.on_delta(_delta(reasoning="chunk "))
+        emitter.on_delta(_delta(reasoning="three"))
+        # No close; verify the persisted row already has everything.
+        assert len(session) == 1
+        assert session[0].content == "first chunk three"
+
+
 class TestReasoningPersistence:
     """The persistence contract: without ``role="reasoning"`` rows in
     session.messages, useHydrateOnStreamEnd overwrites the live-streamed
diff --git a/autogpt_platform/backend/backend/copilot/baseline/service.py b/autogpt_platform/backend/backend/copilot/baseline/service.py
index 474a6834b1..6aa88e9d41 100644
--- a/autogpt_platform/backend/backend/copilot/baseline/service.py
+++ b/autogpt_platform/backend/backend/copilot/baseline/service.py
@@ -321,14 +321,17 @@ def _filter_tools_by_permissions(
 def _resolve_baseline_model(tier: CopilotLlmModel | None) -> str:
     """Pick the model for the baseline path based on the per-request tier.
 
-    The baseline (fast) and SDK (extended thinking) paths now share the
-    same tier-based model resolution — only the *path* differs between
-    "fast" and "extended_thinking".  ``'advanced'`` → Opus;
-    ``'standard'`` / ``None`` → the config default (Sonnet).
+    Baseline resolves independently of SDK via the ``fast_*_model`` cells
+    of the (path, tier) matrix.  ``'standard'`` / ``None`` picks Kimi
+    K2.6 by default (cheap + OpenRouter ``reasoning`` support);
+    ``'advanced'`` picks Opus by default so the advanced tier is a clean
+    A/B against the SDK advanced tier — same model, different path —
+    isolating reasoning-wire + cache differences from model capability.
+    Both defaults are overridable per ``CHAT_FAST_*_MODEL`` env vars.
     """
-    from backend.copilot.service import resolve_chat_model
-
-    return resolve_chat_model(tier)
+    if tier == "advanced":
+        return config.fast_advanced_model
+    return config.fast_standard_model
 
 
 @dataclass
@@ -761,6 +764,19 @@ async def _baseline_tool_executor(
         )
     )
 
+    # Announce the tool call to the session so in-turn guards like
+    # ``require_guide_read`` can see it *right now*, before the tool
+    # actually runs.  Without this, the tool_call row lives only in
+    # ``state.session_messages`` until the ``finally`` block flushes it
+    # into ``session.messages`` at turn end — so a second tool in the
+    # same turn (e.g. ``create_agent`` after ``get_agent_building_guide``)
+    # scans a stale ``session.messages`` and the guard re-fires despite
+    # the guide having been called.  The announce-set is cleared at turn
+    # end; we deliberately don't touch ``session.messages`` here to avoid
+    # duplicating the assistant row that ``_baseline_conversation_updater``
+    # will append at round end.
+    session.announce_inflight_tool_call(tool_name)
+
     try:
         result: StreamToolOutputAvailable = await execute_tool(
             tool_name=tool_name,
@@ -1806,6 +1822,16 @@ async def stream_chat_completion_baseline(
         yield StreamError(errorText=error_msg, code="baseline_error")
         # Still persist whatever we got
     finally:
+        # In-flight tool-call announcements are only meaningful for the
+        # current turn; clear at the top of the outer finally so the next
+        # turn starts with a clean scratch buffer even if one of the
+        # awaited cleanup steps below (usage persistence, session upsert,
+        # transcript upload) raises.  The buffer is a process-local scratch
+        # set — if we leak it into the next turn the guide-read guard would
+        # observe a phantom in-flight call and skip its gate, so this must
+        # run unconditionally.
+        session.clear_inflight_tool_calls()
+
         # Pending messages are drained atomically at turn start and
         # between tool rounds, so there's nothing to clear in finally.
         # Any message pushed after the final drain window stays in the
diff --git a/autogpt_platform/backend/backend/copilot/baseline/service_unit_test.py b/autogpt_platform/backend/backend/copilot/baseline/service_unit_test.py
index 03a9ef99c9..5a95c5c901 100644
--- a/autogpt_platform/backend/backend/copilot/baseline/service_unit_test.py
+++ b/autogpt_platform/backend/backend/copilot/baseline/service_unit_test.py
@@ -1404,6 +1404,16 @@ class TestApplyPromptCacheMarkers:
         assert not _is_anthropic_model("xai/grok-4")
         assert not _is_anthropic_model("meta-llama/llama-3.3-70b-instruct")
 
+    def test_is_anthropic_model_rejects_kimi_routes(self):
+        """Regression guard: Kimi K2.6 is a reasoning route (reasoning
+        extra_body is sent) but NOT an Anthropic route — Moonshot does
+        its own auto prompt caching, so ``cache_control`` markers must
+        NOT be applied. OpenRouter silently drops them today, but if
+        they ever start failing fast we'd want the gate tight."""
+        assert not _is_anthropic_model("moonshotai/kimi-k2.6")
+        assert not _is_anthropic_model("moonshotai/kimi-k2-thinking")
+        assert not _is_anthropic_model("kimi-k2-instruct")
+
     def test_cache_control_uses_configured_ttl(self, monkeypatch):
         """TTL comes from ChatConfig.baseline_prompt_cache_ttl — defaults
         to 1h so the static prefix (system + tools) stays warm across
@@ -1829,7 +1839,7 @@ class TestBaselineReasoningStreaming:
 
     @pytest.mark.asyncio
     async def test_reasoning_param_absent_on_non_anthropic_routes(self):
-        """Non-Anthropic routes (e.g. OpenAI) must not receive ``reasoning``."""
+        """Non-reasoning routes (e.g. OpenAI) must not receive ``reasoning``."""
         state = _BaselineStreamState(model="openai/gpt-4o")
 
         mock_client = MagicMock()
@@ -1850,6 +1860,54 @@ class TestBaselineReasoningStreaming:
         extra_body = mock_client.chat.completions.create.call_args[1]["extra_body"]
         assert "reasoning" not in extra_body
 
+    @pytest.mark.asyncio
+    async def test_kimi_route_sends_reasoning_but_no_cache_control(self):
+        """Kimi K2.6 is the default fast_model and sends ``reasoning`` via
+        OpenRouter's unified extension.  It must NOT receive ``cache_control``
+        markers or the ``anthropic-beta`` header — Moonshot uses its own
+        auto-caching and those Anthropic-only fields would either get
+        silently dropped or (worst case) 400 on a future provider change."""
+        state = _BaselineStreamState(model="moonshotai/kimi-k2.6")
+
+        mock_client = MagicMock()
+        mock_client.chat.completions.create = AsyncMock(
+            return_value=_make_stream_mock()
+        )
+
+        with patch(
+            "backend.copilot.baseline.service._get_openai_client",
+            return_value=mock_client,
+        ):
+            await _baseline_llm_caller(
+                messages=[
+                    {"role": "system", "content": "you are a helpful assistant"},
+                    {"role": "user", "content": "hi"},
+                ],
+                tools=[
+                    {
+                        "type": "function",
+                        "function": {"name": "echo", "parameters": {}},
+                    }
+                ],
+                state=state,
+            )
+
+        call_kwargs = mock_client.chat.completions.create.call_args[1]
+        extra_body = call_kwargs["extra_body"]
+        # Reasoning param on — the whole point of picking Kimi is the
+        # cheap-but-still-reasoning-capable path.
+        assert "reasoning" in extra_body
+        assert extra_body["reasoning"]["max_tokens"] > 0
+        # Anthropic-only fields stay off.
+        assert "extra_headers" not in call_kwargs
+        sys_msg = call_kwargs["messages"][0]
+        sys_content = sys_msg.get("content")
+        if isinstance(sys_content, list):
+            assert all("cache_control" not in block for block in sys_content)
+        tools = call_kwargs.get("tools", [])
+        for t in tools:
+            assert "cache_control" not in t
+
     @pytest.mark.asyncio
     async def test_reasoning_only_stream_still_closes_block(self):
         """Regression: a stream with only reasoning (no text, no tool_call)
diff --git a/autogpt_platform/backend/backend/copilot/baseline/transcript_integration_test.py b/autogpt_platform/backend/backend/copilot/baseline/transcript_integration_test.py
index 8d6fb50a53..808b06eb32 100644
--- a/autogpt_platform/backend/backend/copilot/baseline/transcript_integration_test.py
+++ b/autogpt_platform/backend/backend/copilot/baseline/transcript_integration_test.py
@@ -63,21 +63,123 @@ def _make_session_messages(*roles: str) -> list[ChatMessage]:
 
 
 class TestResolveBaselineModel:
-    """Baseline model resolution honours the per-request tier toggle."""
+    """Baseline model resolution honours the per-request tier toggle.
 
-    def test_advanced_tier_selects_advanced_model(self):
-        assert _resolve_baseline_model("advanced") == config.advanced_model
+    Baseline reads the ``fast_*_model`` cells of the (path, tier) matrix
+    and never falls through to the SDK-side ``thinking_*_model`` cells.
+    Default routing:
+    - ``standard`` / ``None`` → ``config.fast_standard_model`` (Kimi K2.6)
+    - ``advanced`` → ``config.fast_advanced_model`` (Opus — same as SDK's
+      advanced tier, so the advanced A/B isolates path differences)
+    """
 
-    def test_standard_tier_selects_default_model(self):
-        assert _resolve_baseline_model("standard") == config.model
+    def test_advanced_tier_selects_fast_advanced_model(self):
+        assert _resolve_baseline_model("advanced") == config.fast_advanced_model
 
-    def test_none_tier_selects_default_model(self):
-        """Baseline users without a tier MUST keep the default (standard)."""
-        assert _resolve_baseline_model(None) == config.model
+    def test_standard_tier_selects_fast_standard_model(self):
+        assert _resolve_baseline_model("standard") == config.fast_standard_model
 
-    def test_standard_and_advanced_models_differ(self):
-        """Advanced tier defaults to a different (Opus) model than standard."""
-        assert config.model != config.advanced_model
+    def test_none_tier_selects_fast_standard_model(self):
+        """Baseline users without a tier get the cheap fast-standard default."""
+        assert _resolve_baseline_model(None) == config.fast_standard_model
+
+    def test_fast_standard_default_is_kimi(self):
+        """Shipped default: Kimi K2.6 on the baseline standard cell.
+
+        Asserts the declared ``Field`` default — env-independent — so a
+        deploy-time ``CHAT_FAST_STANDARD_MODEL`` rollback override
+        doesn't fail CI while still pinning the shipped default.
+        """
+        from backend.copilot.config import ChatConfig
+
+        assert (
+            ChatConfig.model_fields["fast_standard_model"].default
+            == "moonshotai/kimi-k2.6"
+        )
+
+    def test_fast_advanced_default_is_opus(self):
+        """Shipped default: Opus on the baseline advanced cell — mirrors
+        the SDK advanced cell so the advanced-tier A/B stays clean
+        (same model, different path)."""
+        from backend.copilot.config import ChatConfig
+
+        assert (
+            ChatConfig.model_fields["fast_advanced_model"].default
+            == "anthropic/claude-opus-4.7"
+        )
+
+    def test_standard_cells_diverge_across_paths(self):
+        """The whole point of the split: baseline cheap (Kimi) vs SDK
+        Anthropic-only (Sonnet).  If the shipped standard defaults ever
+        collapse to the same value someone lost the cost savings.
+        Checked against ``Field`` defaults, not the env-backed singleton."""
+        from backend.copilot.config import ChatConfig
+
+        assert (
+            ChatConfig.model_fields["thinking_standard_model"].default
+            != ChatConfig.model_fields["fast_standard_model"].default
+        )
+
+    def test_standard_and_advanced_cells_differ_on_fast(self):
+        """Advanced tier defaults to a different model than standard on
+        the baseline path.  Checked against declared ``Field`` defaults
+        so operator env overrides don't flake the test."""
+        from backend.copilot.config import ChatConfig
+
+        assert (
+            ChatConfig.model_fields["fast_standard_model"].default
+            != ChatConfig.model_fields["fast_advanced_model"].default
+        )
+
+    def test_legacy_env_aliases_route_to_new_fields(self, monkeypatch):
+        """Backward compat: the pre-split env var names must still bind.
+
+        The four-field matrix was introduced with ``validation_alias``
+        entries so that existing deployments setting ``CHAT_MODEL`` /
+        ``CHAT_ADVANCED_MODEL`` / ``CHAT_FAST_MODEL`` continue to override
+        the same effective cell without a rename.  Construct a fresh
+        ``ChatConfig`` with each legacy name set and confirm it lands on
+        the new field.
+        """
+        from backend.copilot.config import ChatConfig
+
+        monkeypatch.setenv("CHAT_MODEL", "legacy/sonnet-via-chat-model")
+        monkeypatch.setenv("CHAT_ADVANCED_MODEL", "legacy/opus-via-advanced")
+        monkeypatch.setenv("CHAT_FAST_MODEL", "legacy/fast-via-fast-model")
+
+        cfg = ChatConfig()
+
+        assert cfg.thinking_standard_model == "legacy/sonnet-via-chat-model"
+        assert cfg.thinking_advanced_model == "legacy/opus-via-advanced"
+        assert cfg.fast_standard_model == "legacy/fast-via-fast-model"
+
+    def test_all_four_new_env_vars_bind_to_their_cells(self, monkeypatch):
+        """Each of the four (path, tier) cells must be overridable via
+        its documented ``CHAT_*_*_MODEL`` env var — including
+        ``CHAT_FAST_ADVANCED_MODEL`` which was missing a
+        ``validation_alias`` in the original split and only bound
+        implicitly through ``env_prefix``.  Pinning all four here so
+        that whenever someone touches the config shape, an accidental
+        unbinding fails CI instead of silently ignoring operator
+        overrides.
+        """
+        from backend.copilot.config import ChatConfig
+
+        monkeypatch.setenv("CHAT_FAST_STANDARD_MODEL", "explicit/fast-std")
+        monkeypatch.setenv("CHAT_FAST_ADVANCED_MODEL", "explicit/fast-adv")
+        monkeypatch.setenv("CHAT_THINKING_STANDARD_MODEL", "explicit/think-std")
+        monkeypatch.setenv("CHAT_THINKING_ADVANCED_MODEL", "explicit/think-adv")
+        # Clear the legacy aliases so they don't win priority in
+        # ``AliasChoices`` (first match wins).
+        for legacy in ("CHAT_MODEL", "CHAT_ADVANCED_MODEL", "CHAT_FAST_MODEL"):
+            monkeypatch.delenv(legacy, raising=False)
+
+        cfg = ChatConfig()
+
+        assert cfg.fast_standard_model == "explicit/fast-std"
+        assert cfg.fast_advanced_model == "explicit/fast-adv"
+        assert cfg.thinking_standard_model == "explicit/think-std"
+        assert cfg.thinking_advanced_model == "explicit/think-adv"
 
 
 class TestLoadPriorTranscript:
diff --git a/autogpt_platform/backend/backend/copilot/config.py b/autogpt_platform/backend/backend/copilot/config.py
index 1bb63fe1da..1183217f37 100644
--- a/autogpt_platform/backend/backend/copilot/config.py
+++ b/autogpt_platform/backend/backend/copilot/config.py
@@ -3,7 +3,7 @@
 import os
 from typing import Literal
 
-from pydantic import Field, field_validator
+from pydantic import AliasChoices, Field, field_validator
 from pydantic_settings import BaseSettings
 
 from backend.util.clients import OPENROUTER_BASE_URL
@@ -17,8 +17,12 @@ from backend.util.clients import OPENROUTER_BASE_URL
 CopilotMode = Literal["fast", "extended_thinking"]
 
 # Per-request model tier set by the frontend model toggle.
-# 'standard' uses ``ChatConfig.model`` (Sonnet by default).
-# 'advanced' uses ``ChatConfig.advanced_model`` (Opus by default).
+# 'standard' picks the cheaper everyday model for the active path —
+#   ``fast_standard_model`` on the baseline path, ``thinking_standard_model``
+#   on the SDK path.
+# 'advanced' picks the premium model for the active path — ``fast_advanced_model``
+#   on the baseline path, ``thinking_advanced_model`` on the SDK path (both
+#   default to Opus today).
 # None means no preference — falls through to LD per-user targeting, then config.
 # Using tier names instead of model names keeps the contract model-agnostic.
 CopilotLlmModel = Literal["standard", "advanced"]
@@ -27,21 +31,61 @@ CopilotLlmModel = Literal["standard", "advanced"]
 class ChatConfig(BaseSettings):
     """Configuration for the chat system."""
 
-    # Chat model tiers — applied orthogonally to the path (fast=baseline vs
-    # extended_thinking=SDK).  The "fast" vs "extended_thinking" toggle picks
-    # which code path runs (no reasoning / heavy SDK); "standard" vs
-    # "advanced" picks the model inside that path.
-    model: str = Field(
-        default="anthropic/claude-sonnet-4-6",
-        description="Model used for the 'standard' tier (Sonnet by default). "
-        "Applies to both baseline (fast) and SDK (extended thinking) paths. "
-        "Override via CHAT_MODEL env var.",
+    # Chat model tiers — a 2×2 of (path, tier).  ``path`` = ``CopilotMode``
+    # (``"fast"`` → baseline OpenAI-compat / any OpenRouter model;
+    # ``"extended_thinking"`` → Claude Agent SDK, Anthropic-only CLI).
+    # ``tier`` = ``CopilotLlmModel`` (``"standard"`` / ``"advanced"``).
+    # Each cell has its own config so the two paths can evolve
+    # independently (cheap provider on baseline, Anthropic on SDK) at each
+    # tier without conflating one path's needs with the other's constraint.
+    #
+    # Historical env var names (``CHAT_MODEL`` / ``CHAT_ADVANCED_MODEL`` /
+    # ``CHAT_FAST_MODEL``) are preserved via ``validation_alias`` so
+    # existing deployments continue to override the same effective cell.
+    fast_standard_model: str = Field(
+        default="moonshotai/kimi-k2.6",
+        validation_alias=AliasChoices(
+            "CHAT_FAST_STANDARD_MODEL",
+            "CHAT_FAST_MODEL",
+        ),
+        description="Baseline path, 'standard' / ``None`` tier.  Kimi K2.6 "
+        "by default: ~5x cheaper input and ~5.4x cheaper output than Sonnet, "
+        "SWE-Bench Verified parity with Opus, and OpenRouter advertises the "
+        "``reasoning`` + ``include_reasoning`` extension params on the "
+        "Moonshot endpoints — so the baseline reasoning plumbing lights up "
+        "without provider-specific code.  Roll back to the Anthropic route "
+        "via ``CHAT_FAST_STANDARD_MODEL=anthropic/claude-sonnet-4-6`` (then "
+        "``cache_control`` breakpoints reactivate via "
+        "``_is_anthropic_model``).",
     )
-    advanced_model: str = Field(
-        default="anthropic/claude-opus-4-7",
-        description="Model used for the 'advanced' tier (Opus by default). "
-        "Applies to both baseline (fast) and SDK (extended thinking) paths. "
-        "Override via CHAT_ADVANCED_MODEL env var.",
+    fast_advanced_model: str = Field(
+        default="anthropic/claude-opus-4.7",
+        validation_alias=AliasChoices("CHAT_FAST_ADVANCED_MODEL"),
+        description="Baseline path, 'advanced' tier.  Opus by default. "
+        "Override via ``CHAT_FAST_ADVANCED_MODEL``.",
+    )
+    thinking_standard_model: str = Field(
+        default="anthropic/claude-sonnet-4-6",
+        validation_alias=AliasChoices(
+            "CHAT_THINKING_STANDARD_MODEL",
+            "CHAT_MODEL",
+        ),
+        description="SDK (extended-thinking) path, 'standard' / ``None`` "
+        "tier.  Sonnet by default: the Claude Agent SDK CLI only speaks to "
+        "Anthropic endpoints, so the standard SDK tier has to stay on an "
+        "Anthropic model regardless of what the baseline path runs.  "
+        "Override via ``CHAT_THINKING_STANDARD_MODEL`` (legacy "
+        "``CHAT_MODEL`` still honored).",
+    )
+    thinking_advanced_model: str = Field(
+        default="anthropic/claude-opus-4.7",
+        validation_alias=AliasChoices(
+            "CHAT_THINKING_ADVANCED_MODEL",
+            "CHAT_ADVANCED_MODEL",
+        ),
+        description="SDK (extended-thinking) path, 'advanced' tier.  Opus "
+        "by default.  Override via ``CHAT_THINKING_ADVANCED_MODEL`` "
+        "(legacy ``CHAT_ADVANCED_MODEL`` still honored).",
     )
     title_model: str = Field(
         default="openai/gpt-4o-mini",
@@ -426,3 +470,10 @@ class ChatConfig(BaseSettings):
         env_file = ".env"
         env_file_encoding = "utf-8"
         extra = "ignore"  # Ignore extra environment variables
+        # Accept both the Python attribute name and the validation_alias when
+        # constructing a ``ChatConfig`` directly (e.g. in tests passing
+        # ``thinking_standard_model=...``).  Without this, pydantic only
+        # accepts the alias names (``CHAT_THINKING_STANDARD_MODEL`` env) and
+        # rejects field-name kwargs — breaking ``ChatConfig(field=...)`` in
+        # every test that constructs a config.
+        populate_by_name = True
diff --git a/autogpt_platform/backend/backend/copilot/model.py b/autogpt_platform/backend/backend/copilot/model.py
index 3e4e8923ab..1adef8e7c8 100644
--- a/autogpt_platform/backend/backend/copilot/model.py
+++ b/autogpt_platform/backend/backend/copilot/model.py
@@ -20,7 +20,7 @@ from openai.types.chat.chat_completion_message_tool_call_param import (
 )
 from prisma.models import ChatMessage as PrismaChatMessage
 from prisma.models import ChatSession as PrismaChatSession
-from pydantic import BaseModel
+from pydantic import BaseModel, PrivateAttr
 
 from backend.data.db_accessors import chat_db, library_db
 from backend.data.graph import GraphSettings
@@ -205,6 +205,15 @@ class ChatSessionInfo(BaseModel):
 
 class ChatSession(ChatSessionInfo):
     messages: list[ChatMessage]
+    # In-flight tool-call names for the CURRENT turn.  Not persisted to
+    # DB and not serialised on the wire — ``PrivateAttr`` keeps this a
+    # process-local scratch buffer that's invisible to ``model_dump`` /
+    # ``model_dump_json`` / the redis cache path.  Populated by the
+    # baseline tool executor the moment a tool is dispatched so in-turn
+    # guards (e.g. ``require_guide_read``) can see the call before it
+    # lands in ``messages`` at turn-end.  Cleared when the turn
+    # completes.
+    _inflight_tool_calls: set[str] = PrivateAttr(default_factory=set)
 
     @classmethod
     def new(
@@ -242,6 +251,56 @@ class ChatSession(ChatSessionInfo):
             messages=[ChatMessage.from_db(m) for m in prisma_session.Messages],
         )
 
+    def announce_inflight_tool_call(self, tool_name: str) -> None:
+        """Record that *tool_name* is being dispatched in the current turn.
+
+        Called by the baseline tool executor **before** the tool actually
+        runs (the announcement is about dispatch, not success).  If the
+        tool raises, the name stays in the buffer for the rest of the
+        turn — that matches the guide-read gate's contract ("was the tool
+        called?") but means any future gate wanting *successful*
+        dispatches would need its own tracking.
+
+        Lets in-turn guards (see
+        ``copilot/tools/helpers.py::require_guide_read``) see a tool
+        call the moment it's issued, instead of waiting for the
+        ``session.messages`` flush at turn end — fixing a loop where a
+        second tool in the same turn re-fires a guard despite the
+        guarding tool having already been called (seen on Kimi K2.6 in
+        particular because its aggressive tool-call chaining exercises
+        this path much more than Sonnet does).  The buffer is cleared by
+        :meth:`clear_inflight_tool_calls` at turn end.
+        """
+        self._inflight_tool_calls.add(tool_name)
+
+    def clear_inflight_tool_calls(self) -> None:
+        """Reset the in-flight tool-call announcement buffer."""
+        self._inflight_tool_calls.clear()
+
+    def has_tool_been_called(self, tool_name: str) -> bool:
+        """True when *tool_name* has been called in this session.
+
+        Checks the in-flight announcement buffer (for calls dispatched
+        in the *current* turn but not yet flushed into ``messages``) and
+        the durable ``messages`` history (for past turns + prior rounds
+        within this turn whose writes already landed).  The durable
+        scan is session-wide, not turn-scoped: a matching tool call
+        anywhere in ``messages`` counts.  This matches the guide-read
+        contract — once the guide has been read in the session, the
+        agent doesn't need to re-read it for later create/edit/fix
+        tools.
+        """
+        if tool_name in self._inflight_tool_calls:
+            return True
+        for msg in reversed(self.messages):
+            if msg.role != "assistant" or not msg.tool_calls:
+                continue
+            for tc in msg.tool_calls:
+                name = tc.get("function", {}).get("name") or tc.get("name")
+                if name == tool_name:
+                    return True
+        return False
+
     def add_tool_call_to_current_turn(self, tool_call: dict) -> None:
         """Attach a tool_call to the current turn's assistant message.
 
diff --git a/autogpt_platform/backend/backend/copilot/permissions.py b/autogpt_platform/backend/backend/copilot/permissions.py
index a87cad1e9b..58cce98fbf 100644
--- a/autogpt_platform/backend/backend/copilot/permissions.py
+++ b/autogpt_platform/backend/backend/copilot/permissions.py
@@ -107,6 +107,7 @@ ToolName = Literal[
     "validate_agent_graph",
     "view_agent_output",
     "web_fetch",
+    "web_search",
     "write_workspace_file",
     # SDK built-ins
     "Agent",
diff --git a/autogpt_platform/backend/backend/copilot/sdk/service.py b/autogpt_platform/backend/backend/copilot/sdk/service.py
index 6c7493c045..69dda8f227 100644
--- a/autogpt_platform/backend/backend/copilot/sdk/service.py
+++ b/autogpt_platform/backend/backend/copilot/sdk/service.py
@@ -450,7 +450,9 @@ async def _reduce_context(
     # useful for the eventual upload_transcript call that seeds future turns.
     if transcript_content and not tried_compaction:
         compacted = await compact_transcript(
-            transcript_content, model=config.model, log_prefix=log_prefix
+            transcript_content,
+            model=config.thinking_standard_model,
+            log_prefix=log_prefix,
         )
         if (
             compacted
@@ -700,7 +702,7 @@ def _resolve_sdk_model() -> str | None:
     """Resolve the model name for the Claude Agent SDK CLI.
 
     Uses `config.claude_agent_model` if set, otherwise derives from
-    `config.model` via :func:`_normalize_model_name`.
+    `config.thinking_standard_model` via :func:`_normalize_model_name`.
 
     When `use_claude_code_subscription` is enabled and no explicit
     `claude_agent_model` is set, returns `None` so the CLI uses the
@@ -710,7 +712,7 @@ def _resolve_sdk_model() -> str | None:
         return config.claude_agent_model
     if config.use_claude_code_subscription:
         return None
-    return _normalize_model_name(config.model)
+    return _normalize_model_name(config.thinking_standard_model)
 
 
 def _resolve_fallback_model() -> str | None:
@@ -739,7 +741,7 @@ async def _resolve_sdk_model_for_request(
     cost (reported by the SDK) already reflects model-pricing differences.
     """
     if model == "advanced":
-        sdk_model = _normalize_model_name(config.advanced_model)
+        sdk_model = _normalize_model_name(config.thinking_advanced_model)
         logger.info(
             "[SDK] [%s] Per-request model override: advanced (%s)",
             session_id[:12] if session_id else "?",
@@ -1191,7 +1193,10 @@ async def _compress_messages(
 
     try:
         result = await _run_compression(
-            messages_dict, config.model, "[SDK]", target_tokens=target_tokens
+            messages_dict,
+            config.thinking_standard_model,
+            "[SDK]",
+            target_tokens=target_tokens,
         )
     except Exception as exc:
         # Guard against timeouts or unexpected errors in compression —
@@ -3856,7 +3861,7 @@ async def stream_chat_completion_sdk(
             cache_creation_tokens=turn_cache_creation_tokens,
             log_prefix=log_prefix,
             cost_usd=turn_cost_usd,
-            model=sdk_model or config.model,
+            model=sdk_model or config.thinking_standard_model,
             provider="anthropic",
         )
 
diff --git a/autogpt_platform/backend/backend/copilot/sdk/service_helpers_test.py b/autogpt_platform/backend/backend/copilot/sdk/service_helpers_test.py
index 3b919c6036..4eb5bc4ac2 100644
--- a/autogpt_platform/backend/backend/copilot/sdk/service_helpers_test.py
+++ b/autogpt_platform/backend/backend/copilot/sdk/service_helpers_test.py
@@ -364,9 +364,10 @@ class TestNormalizeModelName:
     """Unit tests for the model-name normalisation helper.
 
     The per-request model toggle calls _normalize_model_name with either
-    ``"anthropic/claude-opus-4-6"`` (for 'advanced') or ``config.model`` (for
-    'standard').  These tests verify the OpenRouter/provider-prefix stripping
-    that keeps the value compatible with the Claude CLI.
+    ``config.thinking_advanced_model`` (for 'advanced') or
+    ``config.thinking_standard_model`` (for 'standard').  These tests verify
+    the OpenRouter/provider-prefix stripping that keeps the value compatible
+    with the Claude CLI.
     """
 
     def test_strips_anthropic_prefix(self):
diff --git a/autogpt_platform/backend/backend/copilot/sdk/service_test.py b/autogpt_platform/backend/backend/copilot/sdk/service_test.py
index d47f67252a..619fce3017 100644
--- a/autogpt_platform/backend/backend/copilot/sdk/service_test.py
+++ b/autogpt_platform/backend/backend/copilot/sdk/service_test.py
@@ -395,7 +395,7 @@ class TestResolveSdkModel:
         from backend.copilot import config as cfg_mod
 
         cfg = cfg_mod.ChatConfig(
-            model="anthropic/claude-opus-4.6",
+            thinking_standard_model="anthropic/claude-opus-4.6",
             claude_agent_model=None,
             use_openrouter=True,
             api_key="or-key",
@@ -412,7 +412,7 @@ class TestResolveSdkModel:
         from backend.copilot import config as cfg_mod
 
         cfg = cfg_mod.ChatConfig(
-            model="anthropic/claude-opus-4.6",
+            thinking_standard_model="anthropic/claude-opus-4.6",
             claude_agent_model=None,
             use_openrouter=False,
             api_key=None,
@@ -430,7 +430,7 @@ class TestResolveSdkModel:
         from backend.copilot import config as cfg_mod
 
         cfg = cfg_mod.ChatConfig(
-            model="anthropic/claude-opus-4.6",
+            thinking_standard_model="anthropic/claude-opus-4.6",
             claude_agent_model=None,
             use_openrouter=True,
             api_key=None,
@@ -447,7 +447,7 @@ class TestResolveSdkModel:
         from backend.copilot import config as cfg_mod
 
         cfg = cfg_mod.ChatConfig(
-            model="anthropic/claude-opus-4.6",
+            thinking_standard_model="anthropic/claude-opus-4.6",
             claude_agent_model="claude-sonnet-4-5-20250514",
             use_openrouter=True,
             api_key="or-key",
@@ -462,7 +462,7 @@ class TestResolveSdkModel:
         from backend.copilot import config as cfg_mod
 
         cfg = cfg_mod.ChatConfig(
-            model="anthropic/claude-opus-4.6",
+            thinking_standard_model="anthropic/claude-opus-4.6",
             claude_agent_model=None,
             use_openrouter=False,
             api_key=None,
@@ -477,7 +477,7 @@ class TestResolveSdkModel:
         from backend.copilot import config as cfg_mod
 
         cfg = cfg_mod.ChatConfig(
-            model="claude-opus-4.6",
+            thinking_standard_model="claude-opus-4.6",
             claude_agent_model=None,
             use_openrouter=False,
             api_key=None,
diff --git a/autogpt_platform/backend/backend/copilot/sdk/tool_adapter.py b/autogpt_platform/backend/backend/copilot/sdk/tool_adapter.py
index d97937da23..7e1fa0396d 100644
--- a/autogpt_platform/backend/backend/copilot/sdk/tool_adapter.py
+++ b/autogpt_platform/backend/backend/copilot/sdk/tool_adapter.py
@@ -779,7 +779,9 @@ def create_copilot_mcp_server(*, use_e2b: bool = False):
 # In E2B mode, all five are disabled — MCP equivalents provide direct sandbox
 # access.  read_file also handles local tool-results and ephemeral reads.
 _SDK_BUILTIN_FILE_TOOLS = ["Read", "Write", "Edit", "Glob", "Grep"]
-_SDK_BUILTIN_ALWAYS = ["Task", "Agent", "WebSearch", "TodoWrite"]
+# WebSearch moved to ``SDK_DISALLOWED_TOOLS`` — routed through
+# ``mcp__copilot__web_search`` so cost tracking is unified across paths.
+_SDK_BUILTIN_ALWAYS = ["Task", "Agent", "TodoWrite"]
 _SDK_BUILTIN_TOOLS = [*_SDK_BUILTIN_FILE_TOOLS, *_SDK_BUILTIN_ALWAYS]
 
 # SDK built-in tools that must be explicitly blocked.
@@ -805,6 +807,7 @@ _SDK_BUILTIN_TOOLS = [*_SDK_BUILTIN_FILE_TOOLS, *_SDK_BUILTIN_ALWAYS]
 SDK_DISALLOWED_TOOLS = [
     "Bash",
     "WebFetch",
+    "WebSearch",
     "AskUserQuestion",
     "Write",
     "Edit",
diff --git a/autogpt_platform/backend/backend/copilot/service.py b/autogpt_platform/backend/backend/copilot/service.py
index e068a201d3..b0399f87e3 100644
--- a/autogpt_platform/backend/backend/copilot/service.py
+++ b/autogpt_platform/backend/backend/copilot/service.py
@@ -42,17 +42,18 @@ settings = Settings()
 
 
 def resolve_chat_model(tier: CopilotLlmModel | None) -> str:
-    """Return the configured OpenRouter model string for the given tier.
+    """Return the configured SDK model for the given tier.
 
-    Shared by the baseline (fast) and SDK (extended thinking) paths so
-    both honor the same standard/advanced env-var configuration.  ``None``
-    and ``'standard'`` fall through to ``config.model``; ``'advanced'``
-    uses ``config.advanced_model``.  Keep this flat — if a third tier
-    shows up later, extend here and both paths pick it up for free.
+    The SDK (extended-thinking) path is Anthropic-only — the Claude Agent
+    SDK CLI refuses non-Anthropic endpoints — so both SDK tiers resolve
+    to the ``thinking_*_model`` cells.  Baseline has its own resolver
+    (``_resolve_baseline_model``) that reads the ``fast_*_model`` cells;
+    the two paths diverge deliberately at the config layer so a cheaper
+    baseline provider can't break SDK, or vice versa.
     """
     if tier == "advanced":
-        return config.advanced_model
-    return config.model
+        return config.thinking_advanced_model
+    return config.thinking_standard_model
 
 
 _client: LangfuseAsyncOpenAI | None = None
diff --git a/autogpt_platform/backend/backend/copilot/tools/__init__.py b/autogpt_platform/backend/backend/copilot/tools/__init__.py
index 9ba050b79a..7aace646a6 100644
--- a/autogpt_platform/backend/backend/copilot/tools/__init__.py
+++ b/autogpt_platform/backend/backend/copilot/tools/__init__.py
@@ -45,6 +45,7 @@ from .run_sub_session import RunSubSessionTool
 from .search_docs import SearchDocsTool
 from .validate_agent import ValidateAgentGraphTool
 from .web_fetch import WebFetchTool
+from .web_search import WebSearchTool
 from .workspace_files import (
     DeleteWorkspaceFileTool,
     ListWorkspaceFilesTool,
@@ -93,6 +94,7 @@ TOOL_REGISTRY: dict[str, BaseTool] = {
     "get_agent_building_guide": GetAgentBuildingGuideTool(),
     # Web fetch for safe URL retrieval
     "web_fetch": WebFetchTool(),
+    "web_search": WebSearchTool(),
     # Agent-browser multi-step automation (navigate, act, screenshot)
     "browser_navigate": BrowserNavigateTool(),
     "browser_act": BrowserActTool(),
diff --git a/autogpt_platform/backend/backend/copilot/tools/agent_guide_gate_test.py b/autogpt_platform/backend/backend/copilot/tools/agent_guide_gate_test.py
index 850592ec55..a5c03162e3 100644
--- a/autogpt_platform/backend/backend/copilot/tools/agent_guide_gate_test.py
+++ b/autogpt_platform/backend/backend/copilot/tools/agent_guide_gate_test.py
@@ -7,8 +7,6 @@ tokens and then produce JSON that fails validation — wasting turns on
 auto-fix loops.
 """
 
-from unittest.mock import MagicMock
-
 import pytest
 
 from backend.copilot.model import ChatMessage, ChatSession
@@ -21,12 +19,21 @@ def _session_with_messages(
     messages: list[ChatMessage],
     builder_graph_id: str | None = None,
 ) -> ChatSession:
-    """Build a minimal ChatSession whose ``messages`` matches *messages*."""
-    session = MagicMock(spec=ChatSession)
+    """Build a real ChatSession with the given messages.
+
+    Uses ``ChatSession.new`` + attribute reassignment rather than
+    ``MagicMock(spec=...)`` because the gate now calls
+    ``session.has_tool_been_called(...)`` and a ``spec`` mock
+    returns a truthy ``MagicMock`` from that call, hiding real gate
+    behaviour.  A live ``ChatSession`` also correctly initialises the
+    ``_inflight_tool_calls`` PrivateAttr scratch buffer used by the
+    in-turn announcement path.
+    """
+    session = ChatSession.new(
+        "test-user", dry_run=False, builder_graph_id=builder_graph_id
+    )
     session.session_id = "test-session"
     session.messages = messages
-    session.metadata = MagicMock()
-    session.metadata.builder_graph_id = builder_graph_id
     return session
 
 
@@ -124,6 +131,47 @@ def test_tool_name_surfaced_in_error(tool_name: str):
     assert tool_name in result.message
 
 
+def test_inflight_announcement_lets_gate_pass_within_same_turn():
+    """Regression for the Kimi baseline loop: the guide call is
+    dispatched earlier in the SAME turn and buffered by the
+    ``_baseline_tool_executor`` into the in-flight announcement set,
+    but hasn't been flushed into ``session.messages`` yet.  The gate
+    must see it anyway — otherwise a follow-up ``create_agent`` in the
+    same turn re-fires the guard despite the guide call and the model
+    loops retrying the guide."""
+    session = _session_with_messages(
+        [ChatMessage(role="user", content="build something")]
+    )
+    # Simulate _baseline_tool_executor's announce.
+    session.announce_inflight_tool_call("get_agent_building_guide")
+    assert require_guide_read(session, "create_agent") is None
+
+
+def test_inflight_clear_restores_gate_for_next_turn():
+    """End-of-turn cleanup must drop the in-flight buffer so it can't
+    leak into the *next* turn's ``session.messages`` scan (e.g. a second
+    session turn that should legitimately require a fresh guide call if
+    ``messages`` got compressed away)."""
+    session = _session_with_messages([ChatMessage(role="user", content="build")])
+    session.announce_inflight_tool_call("get_agent_building_guide")
+    assert require_guide_read(session, "create_agent") is None
+    session.clear_inflight_tool_calls()
+    # With the buffer cleared and no guide row in messages, the guard
+    # fires again.
+    assert isinstance(require_guide_read(session, "create_agent"), ErrorResponse)
+
+
+def test_inflight_announcement_does_not_serialise_into_model_dump():
+    """PrivateAttr invariant: the scratch buffer must never leak into
+    ``model_dump()`` / the Redis cache payload / the DB — it's
+    process-local turn state, not durable session state."""
+    session = _session_with_messages([])
+    session.announce_inflight_tool_call("get_agent_building_guide")
+    dumped = session.model_dump()
+    assert "_inflight_tool_calls" not in dumped
+    assert "inflight_tool_calls" not in dumped
+
+
 def test_builder_bound_session_bypasses_gate():
     """Builder-bound sessions receive the guide via <builder_context> on
     every turn, so the tool-call gate is unnecessary and only wastes a
diff --git a/autogpt_platform/backend/backend/copilot/tools/helpers.py b/autogpt_platform/backend/backend/copilot/tools/helpers.py
index 3bd134e4c7..6c25e79188 100644
--- a/autogpt_platform/backend/backend/copilot/tools/helpers.py
+++ b/autogpt_platform/backend/backend/copilot/tools/helpers.py
@@ -787,22 +787,18 @@ def _resolve_discriminated_credentials(
 _AGENT_GUIDE_TOOL_NAME = "get_agent_building_guide"
 
 
-def _guide_read_in_session(session: ChatSession) -> bool:
-    """True if this session's assistant messages include a guide tool call."""
-    for msg in reversed(session.messages):
-        if msg.role != "assistant" or not msg.tool_calls:
-            continue
-        for tc in msg.tool_calls:
-            name = tc.get("function", {}).get("name") or tc.get("name")
-            if name == _AGENT_GUIDE_TOOL_NAME:
-                return True
-    return False
-
-
 def require_guide_read(session: ChatSession, tool_name: str):
     """Return an ErrorResponse if the guide hasn't been loaded this session.
 
     Import inline to keep ``helpers.py`` free of tool-response imports.
+    Uses :meth:`ChatSession.has_tool_been_called` which checks both the
+    persisted ``messages`` list (session-wide) and the in-flight
+    announcement buffer — so a guide call dispatched earlier in the
+    *current* turn (before ``session.messages`` flushes at turn end) is
+    recognised too.  Otherwise a second tool in the same turn would
+    re-fire this guard despite the guide having been called — seen on
+    Kimi K2.6 in particular because its aggressive tool-call chaining
+    exercises this path far more than Sonnet does.
     """
     from .models import ErrorResponse  # noqa: PLC0415 — avoid circular import
 
@@ -812,7 +808,7 @@ def require_guide_read(session: ChatSession, tool_name: str):
     # requiring one would waste a round-trip every turn.
     if session.metadata.builder_graph_id:
         return None
-    if _guide_read_in_session(session):
+    if session.has_tool_been_called(_AGENT_GUIDE_TOOL_NAME):
         return None
     return ErrorResponse(
         message=(
diff --git a/autogpt_platform/backend/backend/copilot/tools/models.py b/autogpt_platform/backend/backend/copilot/tools/models.py
index 8fa7e6cbb4..08b62056a4 100644
--- a/autogpt_platform/backend/backend/copilot/tools/models.py
+++ b/autogpt_platform/backend/backend/copilot/tools/models.py
@@ -76,6 +76,7 @@ class ResponseType(str, Enum):
 
     # Web
     WEB_FETCH = "web_fetch"
+    WEB_SEARCH = "web_search"
 
     # Feature requests
     FEATURE_REQUEST_SEARCH = "feature_request_search"
@@ -585,6 +586,30 @@ class WebFetchResponse(ToolResponseBase):
     truncated: bool = False
 
 
+class WebSearchResult(BaseModel):
+    """One entry in a web_search tool response."""
+
+    title: str
+    url: str
+    snippet: str = ""
+    page_age: str | None = None
+
+
+class WebSearchResponse(ToolResponseBase):
+    """Response for web_search tool — mirrors the shape of the SDK's
+    native ``WebSearch`` tool so the LLM sees a consistent interface
+    regardless of which path dispatched the call."""
+
+    type: ResponseType = ResponseType.WEB_SEARCH
+    query: str
+    results: list[WebSearchResult] = Field(default_factory=list)
+    # Backend-reported usage for this call (copied from Anthropic's
+    # ``usage.server_tool_use``).  Surfaces as metadata for frontend
+    # debug panels but is also what drives rate-limit / cost tracking
+    # via ``persist_and_record_usage(provider="anthropic")``.
+    search_requests: int = 0
+
+
 class BashExecResponse(ToolResponseBase):
     """Response for bash_exec tool."""
 
diff --git a/autogpt_platform/backend/backend/copilot/tools/tool_schema_test.py b/autogpt_platform/backend/backend/copilot/tools/tool_schema_test.py
index e0403cdc79..7b370f810c 100644
--- a/autogpt_platform/backend/backend/copilot/tools/tool_schema_test.py
+++ b/autogpt_platform/backend/backend/copilot/tools/tool_schema_test.py
@@ -21,7 +21,11 @@ from backend.copilot.tools import TOOL_REGISTRY
 # response shape carries) and the dry_run description. Keeps the
 # regression gate effective while accepting a deliberate ~120-token
 # spend on LLM-decision-critical copy.
-_CHAR_BUDGET = 32_500
+# Bumped 32500 -> 32800 on PR #12871 for the new web_search tool
+# (server-side Anthropic beta). Description already trimmed to the
+# minimum viable copy; the bump absorbs the schema skeleton cost
+# (~300 chars / ~75 tokens) for a new LLM-facing primitive.
+_CHAR_BUDGET = 32_800
 
 
 @pytest.fixture(scope="module")
diff --git a/autogpt_platform/backend/backend/copilot/tools/web_search.py b/autogpt_platform/backend/backend/copilot/tools/web_search.py
new file mode 100644
index 0000000000..feb999d4d6
--- /dev/null
+++ b/autogpt_platform/backend/backend/copilot/tools/web_search.py
@@ -0,0 +1,224 @@
+"""Web search tool — wraps Anthropic's server-side ``web_search`` beta.
+
+Single entry point for web search on both SDK and baseline paths.  The
+``web_search_20250305`` tool is server-side on Anthropic, so we call
+the Messages API directly regardless of which LLM invoked the copilot
+tool — OpenRouter can't proxy server-side tool execution.
+"""
+
+import logging
+from typing import Any
+
+from anthropic import AsyncAnthropic
+
+from backend.copilot.model import ChatSession
+from backend.copilot.token_tracking import persist_and_record_usage
+from backend.util.settings import Settings
+
+from .base import BaseTool
+from .models import ErrorResponse, ToolResponseBase, WebSearchResponse, WebSearchResult
+
+logger = logging.getLogger(__name__)
+
+_WEB_SEARCH_DISPATCH_MODEL = "claude-haiku-4-5"
+_MAX_DISPATCH_TOKENS = 512
+_DEFAULT_MAX_RESULTS = 5
+_HARD_MAX_RESULTS = 20
+
+
+class WebSearchTool(BaseTool):
+    """Search the public web and return cited results."""
+
+    @property
+    def name(self) -> str:
+        return "web_search"
+
+    @property
+    def description(self) -> str:
+        return (
+            "Search the web for live info (news, recent docs). Returns "
+            "{title, url, snippet}; use web_fetch to deep-dive a URL. "
+            "Prefer one targeted query over many reformulations."
+        )
+
+    @property
+    def parameters(self) -> dict[str, Any]:
+        return {
+            "type": "object",
+            "properties": {
+                "query": {
+                    "type": "string",
+                    "description": "Search query.",
+                },
+                "max_results": {
+                    "type": "integer",
+                    "description": (
+                        f"Max results (default {_DEFAULT_MAX_RESULTS}, "
+                        f"cap {_HARD_MAX_RESULTS})."
+                    ),
+                    "default": _DEFAULT_MAX_RESULTS,
+                },
+            },
+            "required": ["query"],
+        }
+
+    @property
+    def requires_auth(self) -> bool:
+        return False
+
+    @property
+    def is_available(self) -> bool:
+        return bool(Settings().secrets.anthropic_api_key)
+
+    async def _execute(
+        self,
+        user_id: str | None,
+        session: ChatSession,
+        query: str = "",
+        max_results: int = _DEFAULT_MAX_RESULTS,
+        **kwargs: Any,
+    ) -> ToolResponseBase:
+        query = (query or "").strip()
+        session_id = session.session_id if session else None
+        if not query:
+            return ErrorResponse(
+                message="Please provide a non-empty search query.",
+                error="missing_query",
+                session_id=session_id,
+            )
+
+        try:
+            max_results = int(max_results)
+        except (TypeError, ValueError):
+            max_results = _DEFAULT_MAX_RESULTS
+        max_results = max(1, min(max_results, _HARD_MAX_RESULTS))
+
+        api_key = Settings().secrets.anthropic_api_key
+        if not api_key:
+            return ErrorResponse(
+                message=(
+                    "Web search is unavailable — the deployment has no "
+                    "Anthropic API key configured."
+                ),
+                error="web_search_not_configured",
+                session_id=session_id,
+            )
+
+        client = AsyncAnthropic(api_key=api_key)
+        try:
+            resp = await client.messages.create(
+                model=_WEB_SEARCH_DISPATCH_MODEL,
+                max_tokens=_MAX_DISPATCH_TOKENS,
+                tools=[
+                    {
+                        "type": "web_search_20250305",
+                        "name": "web_search",
+                        "max_uses": 1,
+                    }
+                ],
+                messages=[
+                    {
+                        "role": "user",
+                        "content": (
+                            f"Use the web_search tool exactly once with the "
+                            f"query {query!r} and then stop.  Do not "
+                            f"summarise — the caller parses the raw "
+                            f"tool_result."
+                        ),
+                    }
+                ],
+            )
+        except Exception as exc:
+            logger.warning(
+                "[web_search] Anthropic call failed for query=%r: %s", query, exc
+            )
+            return ErrorResponse(
+                message=f"Web search failed: {exc}",
+                error="web_search_failed",
+                session_id=session_id,
+            )
+
+        results, search_requests = _extract_results(resp, limit=max_results)
+
+        cost_usd = _estimate_cost_usd(resp, search_requests=search_requests)
+        try:
+            usage = getattr(resp, "usage", None)
+            await persist_and_record_usage(
+                session=session,
+                user_id=user_id,
+                prompt_tokens=getattr(usage, "input_tokens", 0) or 0,
+                completion_tokens=getattr(usage, "output_tokens", 0) or 0,
+                log_prefix="[web_search]",
+                cost_usd=cost_usd,
+                model=_WEB_SEARCH_DISPATCH_MODEL,
+                provider="anthropic",
+            )
+        except Exception as exc:
+            logger.warning("[web_search] usage tracking failed: %s", exc)
+
+        return WebSearchResponse(
+            message=f"Found {len(results)} result(s) for {query!r}.",
+            query=query,
+            results=results,
+            search_requests=search_requests,
+            session_id=session_id,
+        )
+
+
+def _extract_results(resp: Any, *, limit: int) -> tuple[list[WebSearchResult], int]:
+    """Pull results + server-side request count from an Anthropic response."""
+    results: list[WebSearchResult] = []
+    search_requests = 0
+
+    for block in getattr(resp, "content", []) or []:
+        btype = getattr(block, "type", None)
+        if btype == "web_search_tool_result":
+            content = getattr(block, "content", []) or []
+            for item in content:
+                if getattr(item, "type", None) != "web_search_result":
+                    continue
+                if len(results) >= limit:
+                    break
+                # Anthropic's ``web_search_result`` exposes only
+                # ``title``/``url``/``page_age`` plus an opaque
+                # ``encrypted_content`` blob that is meant for citation
+                # round-tripping, not for display — it is base64-ish
+                # binary and would show as gibberish if surfaced to the
+                # model or the frontend.  There is no plain-text snippet
+                # field in the current beta; callers get the readable
+                # text via the model's ``text`` blocks with citations,
+                # not via this list.  Leave ``snippet`` empty.
+                results.append(
+                    WebSearchResult(
+                        title=getattr(item, "title", "") or "",
+                        url=getattr(item, "url", "") or "",
+                        snippet="",
+                        page_age=getattr(item, "page_age", None),
+                    )
+                )
+
+    usage = getattr(resp, "usage", None)
+    server_tool_use = getattr(usage, "server_tool_use", None) if usage else None
+    if server_tool_use is not None:
+        search_requests = getattr(server_tool_use, "web_search_requests", 0) or 0
+
+    return results, search_requests
+
+
+# Update when Anthropic revises pricing.
+_COST_PER_SEARCH_USD = 0.010  # $10 per 1,000 web_search requests
+_HAIKU_INPUT_USD_PER_MTOK = 1.0
+_HAIKU_OUTPUT_USD_PER_MTOK = 5.0
+
+
+def _estimate_cost_usd(resp: Any, *, search_requests: int) -> float:
+    """Per-search fee × count + Haiku dispatch tokens."""
+    usage = getattr(resp, "usage", None)
+    input_tokens = getattr(usage, "input_tokens", 0) if usage else 0
+    output_tokens = getattr(usage, "output_tokens", 0) if usage else 0
+
+    search_cost = search_requests * _COST_PER_SEARCH_USD
+    inference_cost = (input_tokens / 1_000_000) * _HAIKU_INPUT_USD_PER_MTOK + (
+        output_tokens / 1_000_000
+    ) * _HAIKU_OUTPUT_USD_PER_MTOK
+    return round(search_cost + inference_cost, 6)
diff --git a/autogpt_platform/backend/backend/copilot/tools/web_search_test.py b/autogpt_platform/backend/backend/copilot/tools/web_search_test.py
new file mode 100644
index 0000000000..3d516f295a
--- /dev/null
+++ b/autogpt_platform/backend/backend/copilot/tools/web_search_test.py
@@ -0,0 +1,308 @@
+"""Tests for the ``web_search`` copilot tool.
+
+Covers the result extractor + cost estimator as pure units (fed with
+synthetic Anthropic response objects), plus light integration tests that
+mock ``AsyncAnthropic.messages.create`` and confirm the handler plumbs
+through to ``persist_and_record_usage`` with the right provider tag.
+"""
+
+from types import SimpleNamespace
+from unittest.mock import AsyncMock, patch
+
+import pytest
+
+from backend.copilot.model import ChatSession
+
+from .models import ErrorResponse, WebSearchResponse, WebSearchResult
+from .web_search import (
+    _COST_PER_SEARCH_USD,
+    WebSearchTool,
+    _estimate_cost_usd,
+    _extract_results,
+)
+
+
+def _fake_anthropic_response(
+    *,
+    results: list[dict] | None = None,
+    search_requests: int = 1,
+    input_tokens: int = 120,
+    output_tokens: int = 40,
+) -> SimpleNamespace:
+    """Build a synthetic Anthropic Messages response.
+
+    Matches the shape produced by ``client.messages.create`` when the
+    response includes a ``web_search_tool_result`` content block and
+    ``usage.server_tool_use.web_search_requests`` on the turn meter.
+    """
+    content = []
+    if results is not None:
+        content.append(
+            SimpleNamespace(
+                type="web_search_tool_result",
+                content=[
+                    SimpleNamespace(
+                        type="web_search_result",
+                        title=r.get("title", "untitled"),
+                        url=r.get("url", ""),
+                        encrypted_content=r.get("snippet", ""),
+                        page_age=r.get("page_age"),
+                    )
+                    for r in results
+                ],
+            )
+        )
+    usage = SimpleNamespace(
+        input_tokens=input_tokens,
+        output_tokens=output_tokens,
+        server_tool_use=SimpleNamespace(web_search_requests=search_requests),
+    )
+    return SimpleNamespace(content=content, usage=usage)
+
+
+class TestExtractResults:
+    """The extractor is the only Anthropic-response-shape contact point;
+    pin its behaviour so an API shape change surfaces here first."""
+
+    def test_extracts_title_url_page_age_and_drops_encrypted_snippet(self):
+        # Anthropic's ``web_search_result`` ships an opaque
+        # ``encrypted_content`` blob that is not safe to surface —
+        # the extractor must drop it (snippet=="") regardless of
+        # whether the blob is non-empty.
+        resp = _fake_anthropic_response(
+            results=[
+                {
+                    "title": "Kimi K2.6 launch",
+                    "url": "https://example.com/kimi",
+                    "snippet": "EiJjbGF1ZGUtZW5jcnlwdGVkLWJsb2I=",
+                    "page_age": "1 day",
+                },
+                {
+                    "title": "OpenRouter pricing",
+                    "url": "https://openrouter.ai/moonshotai/kimi-k2.6",
+                    "snippet": "",
+                },
+            ]
+        )
+        out, requests = _extract_results(resp, limit=10)
+        assert requests == 1
+        assert len(out) == 2
+        assert out[0].title == "Kimi K2.6 launch"
+        assert out[0].url == "https://example.com/kimi"
+        assert out[0].snippet == ""
+        assert out[0].page_age == "1 day"
+        assert out[1].snippet == ""
+
+    def test_limit_caps_returned_results(self):
+        resp = _fake_anthropic_response(
+            results=[{"title": f"r{i}", "url": f"https://e/{i}"} for i in range(10)]
+        )
+        out, _ = _extract_results(resp, limit=3)
+        assert len(out) == 3
+        assert [r.title for r in out] == ["r0", "r1", "r2"]
+
+    def test_missing_content_returns_empty(self):
+        resp = SimpleNamespace(content=[], usage=None)
+        out, requests = _extract_results(resp, limit=10)
+        assert out == []
+        assert requests == 0
+
+    def test_non_search_blocks_are_ignored(self):
+        resp = SimpleNamespace(
+            content=[
+                SimpleNamespace(type="text", text="Here's what I found..."),
+                SimpleNamespace(
+                    type="web_search_tool_result",
+                    content=[
+                        SimpleNamespace(
+                            type="web_search_result",
+                            title="real",
+                            url="https://real.example",
+                            encrypted_content="body",
+                            page_age=None,
+                        )
+                    ],
+                ),
+            ],
+            usage=None,
+        )
+        out, _ = _extract_results(resp, limit=10)
+        assert len(out) == 1 and out[0].title == "real"
+
+
+class TestEstimateCostUsd:
+    """Pin the per-search fee + Haiku inference math — the pricing
+    constants in ``web_search.py`` are hard-coded (no live lookup) so a
+    drift between Anthropic's schedule and our constants must surface
+    in this test for the next reader to notice."""
+
+    def test_zero_searches_still_charges_inference(self):
+        resp = _fake_anthropic_response(results=[], search_requests=0)
+        cost = _estimate_cost_usd(resp, search_requests=0)
+        # Haiku at 1000 input / 5000 output tokens = tiny but non-zero.
+        assert 0 < cost < 0.001
+
+    def test_single_search_fee_dominates(self):
+        resp = _fake_anthropic_response(
+            results=[{"title": "x", "url": "https://e"}],
+            search_requests=1,
+            input_tokens=100,
+            output_tokens=20,
+        )
+        cost = _estimate_cost_usd(resp, search_requests=1)
+        # ~$0.010 search + trivial inference — total still ~1 cent.
+        assert cost >= _COST_PER_SEARCH_USD
+        assert cost < _COST_PER_SEARCH_USD + 0.001
+
+    def test_three_searches_linear_in_count(self):
+        resp = _fake_anthropic_response(
+            results=[], search_requests=3, input_tokens=0, output_tokens=0
+        )
+        cost = _estimate_cost_usd(resp, search_requests=3)
+        assert cost == pytest.approx(3 * _COST_PER_SEARCH_USD)
+
+
+class TestWebSearchToolDispatch:
+    """Lightweight integration test: mock the Anthropic client, confirm
+    the handler returns a ``WebSearchResponse`` and the usage tracker is
+    called with ``provider='anthropic'`` (not 'open_router', even on the
+    baseline path — server-side web_search bills Anthropic regardless of
+    the calling LLM's route)."""
+
+    def _session(self) -> ChatSession:
+        s = ChatSession.new("test-user", dry_run=False)
+        s.session_id = "sess-1"
+        return s
+
+    @pytest.mark.asyncio
+    async def test_returns_response_with_results_and_tracks_cost(self, monkeypatch):
+        fake_resp = _fake_anthropic_response(
+            results=[
+                {
+                    "title": "hello",
+                    "url": "https://example.com",
+                    "snippet": "greeting",
+                }
+            ],
+            search_requests=1,
+        )
+        mock_client = type(
+            "MC",
+            (),
+            {
+                "messages": type(
+                    "M", (), {"create": AsyncMock(return_value=fake_resp)}
+                )()
+            },
+        )()
+
+        # Stub the Anthropic API key so ``is_available`` is True.
+        monkeypatch.setattr(
+            "backend.copilot.tools.web_search.Settings",
+            lambda: SimpleNamespace(
+                secrets=SimpleNamespace(anthropic_api_key="sk-test")
+            ),
+        )
+
+        with (
+            patch(
+                "backend.copilot.tools.web_search.AsyncAnthropic",
+                return_value=mock_client,
+            ),
+            patch(
+                "backend.copilot.tools.web_search.persist_and_record_usage",
+                new=AsyncMock(return_value=160),
+            ) as mock_track,
+        ):
+            tool = WebSearchTool()
+            result = await tool._execute(
+                user_id="u1",
+                session=self._session(),
+                query="kimi k2.6 launch",
+                max_results=5,
+            )
+
+        assert isinstance(result, WebSearchResponse)
+        assert result.query == "kimi k2.6 launch"
+        assert len(result.results) == 1
+        assert isinstance(result.results[0], WebSearchResult)
+        assert result.search_requests == 1
+
+        # Cost tracker must have been called with provider="anthropic".
+        assert mock_track.await_count == 1
+        kwargs = mock_track.await_args.kwargs
+        assert kwargs["provider"] == "anthropic"
+        assert kwargs["model"] == "claude-haiku-4-5"
+        assert kwargs["user_id"] == "u1"
+        assert kwargs["cost_usd"] >= _COST_PER_SEARCH_USD
+
+    @pytest.mark.asyncio
+    async def test_missing_api_key_returns_error_without_calling_anthropic(
+        self, monkeypatch
+    ):
+        monkeypatch.setattr(
+            "backend.copilot.tools.web_search.Settings",
+            lambda: SimpleNamespace(secrets=SimpleNamespace(anthropic_api_key="")),
+        )
+        anthropic_stub = AsyncMock()
+        with (
+            patch(
+                "backend.copilot.tools.web_search.AsyncAnthropic",
+                return_value=anthropic_stub,
+            ),
+            patch(
+                "backend.copilot.tools.web_search.persist_and_record_usage",
+                new=AsyncMock(),
+            ) as mock_track,
+        ):
+            tool = WebSearchTool()
+            assert tool.is_available is False
+            result = await tool._execute(
+                user_id="u1",
+                session=self._session(),
+                query="anything",
+            )
+        assert isinstance(result, ErrorResponse)
+        assert result.error == "web_search_not_configured"
+        anthropic_stub.messages.create.assert_not_called()
+        mock_track.assert_not_called()
+
+    @pytest.mark.asyncio
+    async def test_empty_query_rejected_without_api_call(self, monkeypatch):
+        monkeypatch.setattr(
+            "backend.copilot.tools.web_search.Settings",
+            lambda: SimpleNamespace(
+                secrets=SimpleNamespace(anthropic_api_key="sk-test")
+            ),
+        )
+        anthropic_stub = AsyncMock()
+        with patch(
+            "backend.copilot.tools.web_search.AsyncAnthropic",
+            return_value=anthropic_stub,
+        ):
+            tool = WebSearchTool()
+            result = await tool._execute(
+                user_id="u1", session=self._session(), query="   "
+            )
+        assert isinstance(result, ErrorResponse)
+        assert result.error == "missing_query"
+        anthropic_stub.messages.create.assert_not_called()
+
+
+class TestToolRegistryIntegration:
+    """The tool must be registered under the ``web_search`` name so the
+    MCP layer exposes it as ``mcp__copilot__web_search`` — which is
+    what the SDK path now dispatches to (see
+    ``sdk/tool_adapter.py::SDK_DISALLOWED_TOOLS`` which blocks the CLI's
+    native ``WebSearch`` in favour of the MCP route)."""
+
+    def test_web_search_is_in_tool_registry(self):
+        from backend.copilot.tools import TOOL_REGISTRY
+
+        assert "web_search" in TOOL_REGISTRY
+        assert isinstance(TOOL_REGISTRY["web_search"], WebSearchTool)
+
+    def test_sdk_native_websearch_is_disallowed(self):
+        from backend.copilot.sdk.tool_adapter import SDK_DISALLOWED_TOOLS
+
+        assert "WebSearch" in SDK_DISALLOWED_TOOLS
diff --git a/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/GenericTool.tsx b/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/GenericTool.tsx
index 995c18df05..74aa3153d5 100644
--- a/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/GenericTool.tsx
+++ b/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/GenericTool.tsx
@@ -305,15 +305,58 @@ function getWebAccordionData(
     string,
     unknown
   >;
-  const url =
-    getStringField(inp as Record<string, unknown>, "url", "query") ??
-    "Web content";
+  const query = getStringField(inp, "query");
+  const url = getStringField(inp, "url") ?? query ?? "Web content";
+
+  const results = Array.isArray(output.results)
+    ? (output.results as Array<Record<string, unknown>>)
+    : null;
+
+  if (results) {
+    return {
+      title: `${results.length} search result${results.length === 1 ? "" : "s"}`,
+      description: query ? truncate(query, 80) : undefined,
+      content: (
+        <div className="space-y-3">
+          {results.map((r, i) => {
+            const title = getStringField(r, "title") ?? "(untitled)";
+            const href = getStringField(r, "url") ?? "";
+            const snippet = getStringField(r, "snippet");
+            const pageAge = getStringField(r, "page_age");
+            return (
+              <div key={i} className="text-sm">
+                {href ? (
+                  <a
+                    href={href}
+                    target="_blank"
+                    rel="noopener noreferrer"
+                    className="font-medium text-blue-600 hover:underline"
+                  >
+                    {title}
+                  </a>
+                ) : (
+                  <span className="font-medium">{title}</span>
+                )}
+                {href && (
+                  <div className="text-xs text-slate-500">
+                    {truncate(href, 100)}
+                  </div>
+                )}
+                {snippet && <p className="mt-0.5 text-slate-700">{snippet}</p>}
+                {pageAge && (
+                  <div className="mt-0.5 text-xs text-slate-400">{pageAge}</div>
+                )}
+              </div>
+            );
+          })}
+        </div>
+      ),
+    };
+  }
 
-  // Try direct string fields first, then MCP content blocks, then raw JSON
   let content = getStringField(output, "content", "text", "_raw");
   if (!content) content = extractMcpText(output);
   if (!content) {
-    // Fallback: render the raw JSON so the accordion isn't empty
     try {
       const raw = JSON.stringify(output, null, 2);
       if (raw !== "{}") content = raw;
@@ -327,11 +370,7 @@ function getWebAccordionData(
   const message = getStringField(output, "message");
 
   return {
-    title: statusCode
-      ? `Response (${statusCode})`
-      : url
-        ? "Web fetch"
-        : "Search results",
+    title: statusCode ? `Response (${statusCode})` : "Web fetch",
     description: truncate(url, 80),
     content: content ? (
       <ContentCodeBlock>{content}</ContentCodeBlock>
diff --git a/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/__tests__/GenericTool.test.tsx b/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/__tests__/GenericTool.test.tsx
index 4308eb49bf..48e0409393 100644
--- a/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/__tests__/GenericTool.test.tsx
+++ b/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/__tests__/GenericTool.test.tsx
@@ -1,6 +1,6 @@
 import { describe, expect, it } from "vitest";
 import type { ToolUIPart } from "ai";
-import { render, screen } from "@/tests/integrations/test-utils";
+import { fireEvent, render, screen } from "@/tests/integrations/test-utils";
 import { GenericTool } from "../GenericTool";
 
 function makePart(overrides: Record<string, unknown> = {}): ToolUIPart {
@@ -136,4 +136,181 @@ describe("GenericTool", () => {
     const trigger2 = screen.getByRole("button", { expanded: false });
     expect(trigger2.textContent).toContain("completed");
   });
+
+  describe("web_search results rendering", () => {
+    function makeWebSearchPart(
+      results: Array<Record<string, unknown>>,
+      query = "kimi k2.6",
+    ): ToolUIPart {
+      return {
+        type: "tool-web_search",
+        toolCallId: "call-web-1",
+        state: "output-available",
+        input: { query },
+        output: {
+          type: "web_search_response",
+          results,
+          query,
+          search_requests: 1,
+        },
+      } as unknown as ToolUIPart;
+    }
+
+    it("renders an 'N search results' title and shows the query in the description", () => {
+      render(
+        <GenericTool
+          part={makeWebSearchPart([
+            {
+              title: "Kimi K2.6 release notes",
+              url: "https://example.com/kimi",
+              snippet: "A fast model",
+              page_age: "2 days ago",
+            },
+            {
+              title: "Second result",
+              url: "https://example.com/two",
+              snippet: "Another snippet",
+            },
+          ])}
+        />,
+      );
+      const trigger = screen.getByRole("button", { expanded: false });
+      expect(trigger.textContent).toContain("2 search results");
+      expect(trigger.textContent).toContain("kimi k2.6");
+
+      fireEvent.click(trigger);
+
+      const firstLink = screen.getByRole("link", {
+        name: "Kimi K2.6 release notes",
+      }) as HTMLAnchorElement;
+      expect(firstLink.getAttribute("href")).toBe("https://example.com/kimi");
+      expect(firstLink.getAttribute("target")).toBe("_blank");
+      expect(firstLink.getAttribute("rel")).toBe("noopener noreferrer");
+      expect(screen.queryByText("A fast model")).not.toBeNull();
+      expect(screen.queryByText("2 days ago")).not.toBeNull();
+
+      const secondLink = screen.getByRole("link", {
+        name: "Second result",
+      }) as HTMLAnchorElement;
+      expect(secondLink.getAttribute("href")).toBe("https://example.com/two");
+    });
+
+    it("uses singular 'search result' when there is exactly one result", () => {
+      render(
+        <GenericTool
+          part={makeWebSearchPart([
+            {
+              title: "Only result",
+              url: "https://example.com/only",
+              snippet: "Lone snippet",
+            },
+          ])}
+        />,
+      );
+      const trigger = screen.getByRole("button", { expanded: false });
+      expect(trigger.textContent).toContain("1 search result");
+      expect(trigger.textContent).not.toContain("1 search results");
+    });
+
+    it("handles an empty results array (0 search results)", () => {
+      render(<GenericTool part={makeWebSearchPart([])} />);
+      const trigger = screen.getByRole("button", { expanded: false });
+      expect(trigger.textContent).toContain("0 search results");
+    });
+
+    it("renders an untitled non-link when a result has no url", () => {
+      render(
+        <GenericTool
+          part={makeWebSearchPart([
+            { title: "No URL entry", snippet: "Just text" },
+          ])}
+        />,
+      );
+      fireEvent.click(screen.getByRole("button", { expanded: false }));
+      expect(screen.queryByRole("link")).toBeNull();
+      expect(screen.queryByText("No URL entry")).not.toBeNull();
+      expect(screen.queryByText("Just text")).not.toBeNull();
+    });
+
+    it("shows subtitle 'Searched \"…\"' once web_search output is available", () => {
+      const { container } = render(
+        <GenericTool
+          part={makeWebSearchPart(
+            [
+              {
+                title: "Kimi K2.6 release notes",
+                url: "https://example.com/kimi",
+                snippet: "A fast model",
+              },
+            ],
+            "kimi k2.6",
+          )}
+        />,
+      );
+      // MorphingTextAnimation splits each character into its own span and
+      // substitutes spaces with  , so assert on a normalized textContent
+      // rather than the raw substring.
+      const normalized = (container.textContent ?? "").replace(/ /g, " ");
+      expect(normalized).toContain('Searched "kimi k2.6"');
+    });
+
+    it("uses '(untitled)' when a search result has no title", () => {
+      render(
+        <GenericTool
+          part={makeWebSearchPart([
+            { url: "https://example.com/x", snippet: "No title here" },
+          ])}
+        />,
+      );
+      fireEvent.click(screen.getByRole("button", { expanded: false }));
+      const link = screen.getByRole("link", {
+        name: "(untitled)",
+      }) as HTMLAnchorElement;
+      expect(link.getAttribute("href")).toBe("https://example.com/x");
+    });
+  });
+
+  describe("getWebAccordionData non-results fallback", () => {
+    function makeWebFetchPart(output: Record<string, unknown>): ToolUIPart {
+      return {
+        type: "tool-web_fetch",
+        toolCallId: "call-fetch-1",
+        state: "output-available",
+        input: { url: "https://example.com/page" },
+        output,
+      } as unknown as ToolUIPart;
+    }
+
+    it("renders 'Web fetch' title when output has content instead of results", () => {
+      render(
+        <GenericTool part={makeWebFetchPart({ content: "fetched body" })} />,
+      );
+      const trigger = screen.getByRole("button", { expanded: false });
+      expect(trigger.textContent).toContain("Web fetch");
+      fireEvent.click(trigger);
+      expect(screen.queryByText("fetched body")).not.toBeNull();
+    });
+
+    it("renders 'Response (N)' title when output has a status_code", () => {
+      render(
+        <GenericTool
+          part={makeWebFetchPart({ status_code: 404, message: "not found" })}
+        />,
+      );
+      const trigger = screen.getByRole("button", { expanded: false });
+      expect(trigger.textContent).toContain("Response (404)");
+    });
+
+    it("falls back to MCP text blocks when direct content is absent", () => {
+      render(
+        <GenericTool
+          part={makeWebFetchPart({
+            content: [{ type: "text", text: "mcp body" }],
+          })}
+        />,
+      );
+      fireEvent.click(screen.getByRole("button", { expanded: false }));
+      expect(screen.queryByText("mcp body")).not.toBeNull();
+    });
+  });
 });
diff --git a/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/__tests__/helpers.test.ts b/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/__tests__/helpers.test.ts
index de0b9155b6..ca8cc6ba0b 100644
--- a/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/__tests__/helpers.test.ts
+++ b/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/__tests__/helpers.test.ts
@@ -22,6 +22,11 @@ describe("extractToolName", () => {
     const part = { type: "Read" } as unknown as ToolUIPart;
     expect(extractToolName(part)).toBe("Read");
   });
+
+  it("strips the tool- prefix for web_search", () => {
+    const part = { type: "tool-web_search" } as unknown as ToolUIPart;
+    expect(extractToolName(part)).toBe("web_search");
+  });
 });
 
 describe("formatToolName", () => {
@@ -60,8 +65,9 @@ describe("getToolCategory", () => {
     expect(getToolCategory("bash_exec")).toBe("bash");
   });
 
-  it("returns 'web' for web_fetch, WebSearch, WebFetch", () => {
+  it("returns 'web' for web_fetch, web_search, WebSearch, WebFetch", () => {
     expect(getToolCategory("web_fetch")).toBe("web");
+    expect(getToolCategory("web_search")).toBe("web");
     expect(getToolCategory("WebSearch")).toBe("web");
     expect(getToolCategory("WebFetch")).toBe("web");
   });
@@ -229,6 +235,50 @@ describe("getAnimationText", () => {
     expect(getAnimationText(part, "web")).toBe('Searching "test query"');
   });
 
+  it("shows searching text for web_search with a query summary", () => {
+    const part = makePart({
+      type: "tool-web_search",
+      state: "input-streaming",
+      input: { query: "kimi k2.6" },
+    });
+    expect(getAnimationText(part, "web")).toBe('Searching "kimi k2.6"');
+  });
+
+  it("falls back to generic searching text for web_search with no query", () => {
+    const part = makePart({
+      type: "tool-web_search",
+      state: "input-streaming",
+    });
+    expect(getAnimationText(part, "web")).toBe("Searching the web…");
+  });
+
+  it("shows completed text for web_search with a query summary", () => {
+    const part = makePart({
+      type: "tool-web_search",
+      state: "output-available",
+      input: { query: "kimi k2.6" },
+      output: { results: [] },
+    });
+    expect(getAnimationText(part, "web")).toBe('Searched "kimi k2.6"');
+  });
+
+  it("falls back to generic completed text for web_search with no query", () => {
+    const part = makePart({
+      type: "tool-web_search",
+      state: "output-available",
+      output: { results: [] },
+    });
+    expect(getAnimationText(part, "web")).toBe("Web search completed");
+  });
+
+  it("shows error text for web_search failure", () => {
+    const part = makePart({
+      type: "tool-web_search",
+      state: "output-error",
+    });
+    expect(getAnimationText(part, "web")).toBe("Search failed");
+  });
+
   it("shows fetching text for web_fetch", () => {
     const part = makePart({
       type: "tool-web_fetch",
diff --git a/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/helpers.ts b/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/helpers.ts
index f8da6fbc2f..e1103e1435 100644
--- a/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/helpers.ts
+++ b/autogpt_platform/frontend/src/app/(platform)/copilot/tools/GenericTool/helpers.ts
@@ -60,6 +60,7 @@ export function getToolCategory(toolName: string): ToolCategory {
     case "bash_exec":
       return "bash";
     case "web_fetch":
+    case "web_search":
     case "WebSearch":
     case "WebFetch":
       return "web";
@@ -114,6 +115,7 @@ function getInputSummary(toolName: string, input: unknown): string | null {
     case "web_fetch":
     case "WebFetch":
       return typeof inp.url === "string" ? inp.url : null;
+    case "web_search":
     case "WebSearch":
       return typeof inp.query === "string" ? inp.query : null;
     case "browser_navigate":
@@ -220,7 +222,7 @@ export function getAnimationText(
             ? `Running: ${shortSummary}`
             : "Running command\u2026";
         case "web":
-          if (toolName === "WebSearch") {
+          if (toolName === "WebSearch" || toolName === "web_search") {
             return shortSummary
               ? `Searching "${shortSummary}"`
               : "Searching the web\u2026";
@@ -282,7 +284,7 @@ export function getAnimationText(
           // exit status here would just double up.
           return shortSummary ? `Ran: ${shortSummary}` : "Command completed";
         case "web":
-          if (toolName === "WebSearch") {
+          if (toolName === "WebSearch" || toolName === "web_search") {
             return shortSummary
               ? `Searched "${shortSummary}"`
               : "Web search completed";
@@ -352,7 +354,9 @@ export function getAnimationText(
         case "bash":
           return "Command failed";
         case "web":
-          return toolName === "WebSearch" ? "Search failed" : "Fetch failed";
+          return toolName === "WebSearch" || toolName === "web_search"
+            ? "Search failed"
+            : "Fetch failed";
         case "browser":
           return "Browser action failed";
         default:
diff --git a/autogpt_platform/frontend/src/app/api/openapi.json b/autogpt_platform/frontend/src/app/api/openapi.json
index 5997921c26..83fa19af10 100644
--- a/autogpt_platform/frontend/src/app/api/openapi.json
+++ b/autogpt_platform/frontend/src/app/api/openapi.json
@@ -14564,6 +14564,7 @@
           "browser_screenshot",
           "bash_exec",
           "web_fetch",
+          "web_search",
           "feature_request_search",
           "feature_request_created",
           "memory_store",