Update app.py

app.py

@@ -17,7 +17,7 @@ client = OpenAI(api_key=API_KEY, base_url=BASE_URL)
 # 存储用户会话信息
 user_sessions = {}
 
-def get_openai_response(messages, model="gpt-3.5-turbo"):
+def get_openai_response(messages, model="gpt-4o-mini"):
     try:
         response = client.chat.completions.create(
             model=model,
@@ -63,7 +63,7 @@ def wechat():
                 return create_reply(f'模型已切换为 {model}', msg).render()
 
             if user_id not in user_sessions:
-                user_sessions[user_id] = {'model': 'gpt-3.5-turbo', 'messages': []}
+                user_sessions[user_id] = {'model': 'gpt-4o-mini', 'messages': []}
 
             session = user_sessions[user_id]
             session['messages'].append({"role": "user", "content": content})