diff --git a/src/lib/providers/anthropic.ts b/src/lib/providers/anthropic.ts
index fe82295f6..36ee771a9 100644
--- a/src/lib/providers/anthropic.ts
+++ b/src/lib/providers/anthropic.ts
@@ -3,7 +3,7 @@ import type { OpenRouterChatCompletionRequest } from '@/lib/providers/openrouter
 import { normalizeToolCallIds } from '@/lib/tool-calling';
 import type OpenAI from 'openai';
 
-export const CLAUDE_SONNET_CURRENT_MODEL_ID = 'anthropic/claude-sonnet-4.5';
+export const CLAUDE_SONNET_CURRENT_MODEL_ID = 'anthropic/claude-sonnet-4.6';
 
 export const CLAUDE_OPUS_CURRENT_MODEL_ID = 'anthropic/claude-opus-4.6';
 
diff --git a/src/tests/openrouter-models-config.test.ts b/src/tests/openrouter-models-config.test.ts
index 7e6f49171..6fed33267 100644
--- a/src/tests/openrouter-models-config.test.ts
+++ b/src/tests/openrouter-models-config.test.ts
@@ -22,7 +22,7 @@ describe('OpenRouter Models Config', () => {
   test('preferred models should contain expected models', () => {
     const expectedModels = [
       'google/gemini-3-pro-preview',
-      'anthropic/claude-sonnet-4.5',
+      'anthropic/claude-sonnet-4.6',
       'openai/gpt-5.2',
     ];