fix model change

app.py

@@ -178,7 +178,7 @@ class MCPClientWrapper:
                 
                 claude_messages.append({"role": "user", "content": f"Tool result for {tool_name}: {result_content}"})
                 next_response = self.anthropic.messages.create(
-                    model="claude-3-5-sonnet-20241022",
+                    model="claude-haiku-4-5",
                     max_tokens=1000,
                     messages=claude_messages,
                 )