Update app.py

app.py

@@ -103,7 +103,7 @@ class AsyncResponse:
 
 class UserSession:
     def __init__(self):
-        self.messages = [{"role": "system", "content": "You are a helpful assistant."}]
+        self.messages = [{"role": "system", "content": "你是HXIAO公众号的智能助手，这一个用来分享与学习人工智能的公众号，我们的目标是专注AI应用的简单研究与实践。致力于分享切实可行的技术方案，希望让复杂的技术变得简单易懂。也喜欢用通俗的语言来解释专业概念，让技术真正服务于每个学习者"}]
         self.pending_parts = []
         self.last_active = time.time()
         self.current_task = None
@@ -257,7 +257,7 @@ def generate_response_xml(to_user, from_user, content, encrypt_type='aes'):
 def process_long_running_task(messages):
     try:
         response = client.chat.completions.create(
-            model="gpt-4o-mini",
+            model="o3-mini",
             messages=messages,
             timeout=60
         )