feat(server): update claude models (#13677)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Copilot now defaults to the updated Claude Sonnet 4.5 model across
experiences for improved responses.

* **Chores**
* Consolidated available Anthropic models, removing older Sonnet 3.x
variants and standardizing Sonnet 4/4.5 options.
* Updated configuration defaults and schema mappings to reference the
new Sonnet 4.5 model.

* **Tests**
* Updated unit and end-to-end tests to reference the new model to ensure
consistent behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/__tests__/__snapshots__/copilot.spec.ts.md

@@ -473,7 +473,7 @@ Generated by [AVA](https://avajs.dev).
 
 > should honor requested pro model during active
 
-    'claude-sonnet-4@20250514'
+    'claude-sonnet-4-5@20250929'
 
 > should fallback to default model when requesting non-optional model during active
 

packages/backend/server/src/__tests__/copilot.spec.ts

@@ -2074,11 +2074,11 @@ test('should resolve model correctly based on subscription status and prompt con
       messages: {
         create: [{ idx: 0, role: 'system', content: 'test' }],
       },
-      config: { proModels: ['gemini-2.5-pro', 'claude-sonnet-4@20250514'] },
+      config: { proModels: ['gemini-2.5-pro', 'claude-sonnet-4-5@20250929'] },
       optionalModels: [
         'gemini-2.5-flash',
         'gemini-2.5-pro',
-        'claude-sonnet-4@20250514',
+        'claude-sonnet-4-5@20250929',
       ],
     },
   });
@@ -2138,7 +2138,7 @@ test('should resolve model correctly based on subscription status and prompt con
       'should pick default model when no requested model during active'
     );
 
-    const model7 = await s.resolveModel(true, 'claude-sonnet-4@20250514');
+    const model7 = await s.resolveModel(true, 'claude-sonnet-4-5@20250929');
     t.snapshot(model7, 'should honor requested pro model during active');
 
     const model8 = await s.resolveModel(true, 'not-in-optional');

packages/backend/server/src/plugins/copilot/config.ts

@@ -55,7 +55,7 @@ defineModuleConfig('copilot', {
         embedding: 'gemini-embedding-001',
         image: 'gpt-image-1',
         rerank: 'gpt-4.1',
-        coding: 'claude-sonnet-4@20250514',
+        coding: 'claude-sonnet-4-5@20250929',
         complex_text_generation: 'gpt-4o-2024-08-06',
         quick_decision_making: 'gpt-5-mini',
         quick_text_generation: 'gemini-2.5-flash',

packages/backend/server/src/plugins/copilot/prompt/prompts.ts

@@ -1390,7 +1390,7 @@ If there are items in the content that can be used as to-do tasks, please refer
   {
     name: 'Make it real',
     action: 'Make it real',
-    model: 'claude-sonnet-4@20250514',
+    model: 'claude-sonnet-4-5@20250929',
     messages: [
       {
         role: 'system',
@@ -1431,7 +1431,7 @@ When sent new wireframes, respond ONLY with the contents of the html file.`,
   {
     name: 'Make it real with text',
     action: 'Make it real with text',
-    model: 'claude-sonnet-4@20250514',
+    model: 'claude-sonnet-4-5@20250929',
     messages: [
       {
         role: 'system',
@@ -1712,7 +1712,7 @@ const modelActions: Prompt[] = [
   {
     name: 'Apply Updates',
     action: 'Apply Updates',
-    model: 'claude-sonnet-4@20250514',
+    model: 'claude-sonnet-4-5@20250929',
     messages: [
       {
         role: 'user',
@@ -1868,7 +1868,7 @@ Now apply the \`updates\` to the \`content\`, following the intent in \`op\`, an
   },
   {
     name: 'Code Artifact',
-    model: 'claude-sonnet-4@20250514',
+    model: 'claude-sonnet-4-5@20250929',
     messages: [
       {
         role: 'system',
@@ -1932,7 +1932,7 @@ const CHAT_PROMPT: Omit<Prompt, 'name'> = {
   optionalModels: [
     'gemini-2.5-flash',
     'gemini-2.5-pro',
-    'claude-sonnet-4@20250514',
+    'claude-sonnet-4-5@20250929',
   ],
   messages: [
     {
@@ -2092,7 +2092,7 @@ Below is the user's query. Please respond in the user's preferred language witho
       'codeArtifact',
       'blobRead',
     ],
-    proModels: ['gemini-2.5-pro', 'claude-sonnet-4@20250514'],
+    proModels: ['gemini-2.5-pro', 'claude-sonnet-4-5@20250929'],
   },
 };
 

packages/backend/server/src/plugins/copilot/providers/anthropic/official.ts

@@ -30,6 +30,16 @@ export class AnthropicOfficialProvider extends AnthropicProvider<AnthropicOffici
         },
       ],
     },
+    {
+      name: 'Claude Sonnet 4',
+      id: 'claude-sonnet-4-5-20250929',
+      capabilities: [
+        {
+          input: [ModelInputType.Text, ModelInputType.Image],
+          output: [ModelOutputType.Text, ModelOutputType.Object],
+        },
+      ],
+    },
     {
       name: 'Claude Sonnet 4',
       id: 'claude-sonnet-4-20250514',
@@ -40,27 +50,6 @@ export class AnthropicOfficialProvider extends AnthropicProvider<AnthropicOffici
         },
       ],
     },
-    {
-      name: 'Claude 3.7 Sonnet',
-      id: 'claude-3-7-sonnet-20250219',
-      capabilities: [
-        {
-          input: [ModelInputType.Text, ModelInputType.Image],
-          output: [ModelOutputType.Text, ModelOutputType.Object],
-        },
-      ],
-    },
-    {
-      name: 'Claude 3.5 Sonnet',
-      id: 'claude-3-5-sonnet-20241022',
-      capabilities: [
-        {
-          input: [ModelInputType.Text, ModelInputType.Image],
-          output: [ModelOutputType.Text, ModelOutputType.Object],
-          defaultForOutputType: true,
-        },
-      ],
-    },
   ];
 
   protected instance!: AnthropicSDKProvider;

packages/backend/server/src/plugins/copilot/providers/anthropic/vertex.ts

@@ -24,6 +24,16 @@ export class AnthropicVertexProvider extends AnthropicProvider<AnthropicVertexCo
         },
       ],
     },
+    {
+      name: 'Claude Sonnet 4.5',
+      id: 'claude-sonnet-4-5@20250929',
+      capabilities: [
+        {
+          input: [ModelInputType.Text, ModelInputType.Image],
+          output: [ModelOutputType.Text, ModelOutputType.Object],
+        },
+      ],
+    },
     {
       name: 'Claude Sonnet 4',
       id: 'claude-sonnet-4@20250514',
@@ -34,27 +44,6 @@ export class AnthropicVertexProvider extends AnthropicProvider<AnthropicVertexCo
         },
       ],
     },
-    {
-      name: 'Claude 3.7 Sonnet',
-      id: 'claude-3-7-sonnet@20250219',
-      capabilities: [
-        {
-          input: [ModelInputType.Text, ModelInputType.Image],
-          output: [ModelOutputType.Text, ModelOutputType.Object],
-        },
-      ],
-    },
-    {
-      name: 'Claude 3.5 Sonnet',
-      id: 'claude-3-5-sonnet-v2@20241022',
-      capabilities: [
-        {
-          input: [ModelInputType.Text, ModelInputType.Image],
-          output: [ModelOutputType.Text, ModelOutputType.Object],
-          defaultForOutputType: true,
-        },
-      ],
-    },
   ];
 
   protected instance!: GoogleVertexAnthropicProvider;