add max token

app.py

@@ -278,7 +278,7 @@ def chat_with_retry(history_messages, max_retries=MAX_RETRIES):
                 stream=True,
                 temperature=0.1, 
                 top_p=0.9,
-                max_tokens=30000
+                max_tokens=50000
             )
             
             return response