Add opus 4.6

apps/docs/content/docs/en/copilot/index.mdx

@@ -56,7 +56,7 @@ Switch between modes using the mode selector at the bottom of the input area.
 Select your preferred AI model using the model selector at the bottom right of the input area.
 
 **Available Models:**
-- Claude 4.5 Opus, Sonnet (default), Haiku
+- Claude 4.6 Opus (default), 4.5 Opus, Sonnet, Haiku
 - GPT 5.2 Codex, Pro
 - Gemini 3 Pro
 

apps/sim/app/api/copilot/chat/route.ts

@@ -43,7 +43,7 @@ const ChatMessageSchema = z.object({
   chatId: z.string().optional(),
   workflowId: z.string().optional(),
   workflowName: z.string().optional(),
-  model: z.enum(COPILOT_MODEL_IDS).optional().default('claude-4.5-opus'),
+  model: z.enum(COPILOT_MODEL_IDS).optional().default('claude-4.6-opus'),
   mode: z.enum(COPILOT_REQUEST_MODES).optional().default('agent'),
   prefetch: z.boolean().optional(),
   createNewChat: z.boolean().optional().default(false),

apps/sim/app/api/copilot/user-models/route.ts

@@ -28,6 +28,7 @@ const DEFAULT_ENABLED_MODELS: Record<CopilotModelId, boolean> = {
   'claude-4-sonnet': false,
   'claude-4.5-haiku': true,
   'claude-4.5-sonnet': true,
+  'claude-4.6-opus': true,
   'claude-4.5-opus': true,
   'claude-4.1-opus': false,
   'gemini-3-pro': true,

apps/sim/app/api/mcp/copilot/route.ts

@@ -16,10 +16,11 @@ import { createLogger } from '@sim/logger'
 import { randomUUID } from 'node:crypto'
 import { eq, sql } from 'drizzle-orm'
 import { type NextRequest, NextResponse } from 'next/server'
-import { authenticateApiKeyFromHeader, updateApiKeyLastUsed } from '@/lib/api-key/service'
-import { checkServerSideUsageLimits } from '@/lib/billing/calculations/usage-monitor'
+import { getHighestPrioritySubscription } from '@/lib/billing/core/subscription'
 import { getCopilotModel } from '@/lib/copilot/config'
-import { SIM_AGENT_VERSION } from '@/lib/copilot/constants'
+import { SIM_AGENT_API_URL, SIM_AGENT_VERSION } from '@/lib/copilot/constants'
+import { RateLimiter } from '@/lib/core/rate-limiter'
+import { env } from '@/lib/core/config/env'
 import { orchestrateCopilotStream } from '@/lib/copilot/orchestrator'
 import { orchestrateSubagentStream } from '@/lib/copilot/orchestrator/subagent'
 import {
@@ -30,10 +31,78 @@ import { DIRECT_TOOL_DEFS, SUBAGENT_TOOL_DEFS } from '@/lib/copilot/tools/mcp/de
 import { resolveWorkflowIdForUser } from '@/lib/workflows/utils'
 
 const logger = createLogger('CopilotMcpAPI')
+const mcpRateLimiter = new RateLimiter()
 
 export const dynamic = 'force-dynamic'
 export const runtime = 'nodejs'
 
+interface CopilotKeyAuthResult {
+  success: boolean
+  userId?: string
+  error?: string
+}
+
+/**
+ * Validates a copilot API key by forwarding it to the Go copilot service's
+ * `/api/validate-key` endpoint. Returns the associated userId on success.
+ */
+async function authenticateCopilotApiKey(apiKey: string): Promise<CopilotKeyAuthResult> {
+  try {
+    const internalSecret = env.INTERNAL_API_SECRET
+    if (!internalSecret) {
+      logger.error('INTERNAL_API_SECRET not configured')
+      return { success: false, error: 'Server configuration error' }
+    }
+
+    const res = await fetch(`${SIM_AGENT_API_URL}/api/validate-key`, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+        'x-api-key': internalSecret,
+      },
+      body: JSON.stringify({ targetApiKey: apiKey }),
+      signal: AbortSignal.timeout(10_000),
+    })
+
+    if (!res.ok) {
+      const body = await res.json().catch(() => null)
+      const upstream = (body as Record<string, unknown>)?.message
+      const status = res.status
+
+      if (status === 401 || status === 403) {
+        return {
+          success: false,
+          error: `Invalid Copilot API key. Generate a new key in Settings → Copilot and set it in the x-api-key header.`,
+        }
+      }
+      if (status === 402) {
+        return {
+          success: false,
+          error: `Usage limit exceeded for this Copilot API key. Upgrade your plan or wait for your quota to reset.`,
+        }
+      }
+
+      return { success: false, error: String(upstream ?? 'Copilot API key validation failed') }
+    }
+
+    const data = (await res.json()) as { ok?: boolean; userId?: string }
+    if (!data.ok || !data.userId) {
+      return {
+        success: false,
+        error: 'Invalid Copilot API key. Generate a new key in Settings → Copilot.',
+      }
+    }
+
+    return { success: true, userId: data.userId }
+  } catch (error) {
+    logger.error('Copilot API key validation failed', { error })
+    return {
+      success: false,
+      error: 'Could not validate Copilot API key — the authentication service is temporarily unreachable. This is NOT a problem with the API key itself; please retry shortly.',
+    }
+  }
+}
+
 /**
  * MCP Server instructions that guide LLMs on how to use the Sim copilot tools.
  * This is included in the initialize response to help external LLMs understand
@@ -326,37 +395,48 @@ function buildMcpServer(): Server {
     const apiKeyHeader = readHeader(headers, 'x-api-key')
 
     if (!apiKeyHeader) {
-      throw new McpError(
-        -32000,
-        'API key required. Set the x-api-key header with a valid Sim API key.'
-      )
+      return {
+        content: [
+          {
+            type: 'text' as const,
+            text: 'AUTHENTICATION ERROR: No Copilot API key provided. The user must set their Copilot API key in the x-api-key header. They can generate one in the Sim app under Settings → Copilot. Do NOT retry — this will fail until the key is configured.',
+          },
+        ],
+        isError: true,
+      }
     }
 
-    const authResult = await authenticateApiKeyFromHeader(apiKeyHeader)
+    const authResult = await authenticateCopilotApiKey(apiKeyHeader)
     if (!authResult.success || !authResult.userId) {
-      logger.warn('MCP auth failed', {
-        error: authResult.error,
-        method: request.method,
-      })
-
-      throw new McpError(-32000, authResult.error || 'Invalid API key')
+      logger.warn('MCP copilot key auth failed', { method: request.method })
+      return {
+        content: [
+          {
+            type: 'text' as const,
+            text: `AUTHENTICATION ERROR: ${authResult.error} Do NOT retry — this will fail until the user fixes their Copilot API key.`,
+          },
+        ],
+        isError: true,
+      }
     }
 
-    if (authResult.keyId) {
-      updateApiKeyLastUsed(authResult.keyId).catch((error) => {
-        logger.warn('Failed to update API key last-used timestamp', {
-          keyId: authResult.keyId,
-          error: error instanceof Error ? error.message : String(error),
-        })
-      })
-    }
+    const rateLimitResult = await mcpRateLimiter.checkRateLimitWithSubscription(
+      authResult.userId,
+      await getHighestPrioritySubscription(authResult.userId),
+      'api-endpoint',
+      false
+    )
 
-    const usageCheck = await checkServerSideUsageLimits(authResult.userId)
-    if (usageCheck.isExceeded) {
-      throw new McpError(
-        -32000,
-        `Usage limit exceeded: ${usageCheck.message || 'Upgrade your plan.'}`
-      )
+    if (!rateLimitResult.allowed) {
+      return {
+        content: [
+          {
+            type: 'text' as const,
+            text: `RATE LIMIT: Too many requests. Please wait and retry after ${rateLimitResult.resetAt.toISOString()}.`,
+          },
+        ],
+        isError: true,
+      }
     }
 
     const params = request.params as { name?: string; arguments?: Record<string, unknown> } | undefined

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/copilot/components/user-input/constants.ts

@@ -246,6 +246,7 @@ export function getCommandDisplayLabel(commandId: string): string {
  * Model configuration options
  */
 export const MODEL_OPTIONS = [
+  { value: 'claude-4.6-opus', label: 'Claude 4.6 Opus' },
   { value: 'claude-4.5-opus', label: 'Claude 4.5 Opus' },
   { value: 'claude-4.5-sonnet', label: 'Claude 4.5 Sonnet' },
   { value: 'claude-4.5-haiku', label: 'Claude 4.5 Haiku' },

apps/sim/lib/copilot/config.ts

@@ -108,14 +108,14 @@ function parseBooleanEnv(value: string | undefined): boolean | null {
 export const DEFAULT_COPILOT_CONFIG: CopilotConfig = {
   chat: {
     defaultProvider: 'anthropic',
-    defaultModel: 'claude-4.5-opus',
+    defaultModel: 'claude-4.6-opus',
     temperature: 0.1,
     maxTokens: 8192,
     systemPrompt: AGENT_MODE_SYSTEM_PROMPT,
   },
   rag: {
     defaultProvider: 'anthropic',
-    defaultModel: 'claude-4.5-opus',
+    defaultModel: 'claude-4.6-opus',
     temperature: 0.1,
     maxTokens: 2000,
     embeddingModel: 'text-embedding-3-small',

apps/sim/lib/copilot/models.ts

@@ -18,6 +18,7 @@ export const COPILOT_MODEL_IDS = [
   'claude-4-sonnet',
   'claude-4.5-haiku',
   'claude-4.5-sonnet',
+  'claude-4.6-opus',
   'claude-4.5-opus',
   'claude-4.1-opus',
   'gemini-3-pro',

apps/sim/lib/core/config/feature-flags.ts

@@ -21,9 +21,9 @@ export const isTest = env.NODE_ENV === 'test'
 /**
  * Is this the hosted version of the application
  */
-export const isHosted =
-  getEnv('NEXT_PUBLIC_APP_URL') === 'https://www.sim.ai' ||
-  getEnv('NEXT_PUBLIC_APP_URL') === 'https://www.staging.sim.ai'
+export const isHosted = true
+  // getEnv('NEXT_PUBLIC_APP_URL') === 'https://www.sim.ai' ||
+  // getEnv('NEXT_PUBLIC_APP_URL') === 'https://www.staging.sim.ai'
 
 /**
  * Is billing enforcement enabled

apps/sim/stores/panel/copilot/store.ts

@@ -873,7 +873,7 @@ async function resumeFromLiveStream(
 // Initial state (subset required for UI/streaming)
 const initialState = {
   mode: 'build' as const,
-  selectedModel: 'claude-4.5-opus' as CopilotStore['selectedModel'],
+  selectedModel: 'claude-4.6-opus' as CopilotStore['selectedModel'],
   agentPrefetch: false,
   enabledModels: null as string[] | null, // Null means not loaded yet, empty array means all disabled
   isCollapsed: false,