Update app.py

app.py

@@ -86,7 +86,7 @@ def model_chat(query: Optional[str], history: Optional[History], system: str, ra
     messages = history_to_messages(history, system)
     messages.append({'role': Role.USER, 'content': query})
     
-    label_model = f"qwen2.5-{radio.lower()}-instruct"
+    label_model = f"MeChat-{radio.lower()}-instruct"
     
     gen = Generation.call(
         model=label_model,