diff --git a/src/claude/client.ts b/src/claude/client.ts
index 8e16a9a..cad5707 100644
--- a/src/claude/client.ts
+++ b/src/claude/client.ts
@@ -572,7 +572,7 @@ export async function chat(chatId: string, userMessage: string, images: ImageInp
     }
 
     const response = await client.messages.create({
-      model: 'claude-sonnet-4-20250514',
+      model: 'claude-sonnet-4-6',
       max_tokens: 1024,
       system: buildSystemPrompt(chatContext),
       tools,