Update app.py

app.py

@@ -58,7 +58,7 @@ def get_llm_response(prompt: str, system_prompt: str, use_mock: bool = False):
             return "[错误] 请配置 OpenAI API Key"
         
         llm = ChatOpenAI(
-            model="gpt-3.5-turbo",
+            model="gpt-4o-mini",
             temperature=0.7,
             api_key=api_key
         )