Update app.py

app.py

@@ -435,7 +435,7 @@ async def try_claude_api(system_message, claude_messages, timeout=15):
     try:
         start_time = time.time()
         with claude_client.messages.stream(
-            model="claude-3-5-sonnet-20241022",
+            model="claude-3-7-sonnet-20250219",
             max_tokens=7800,
             system=system_message,
             messages=claude_messages