Update app.py

app.py

@@ -915,13 +915,13 @@ def chatbot_fn(user_message, history, image=None):
     messages = system_messages + history + [{"role": "user", "content": user_message}]
 
     payload = {
-        "model": "gpt-5",
+        "model": "gpt-5-chat-latest",
         "messages": messages,
-        "temperature": 0.1,
-        "top_p": 0.9,
+        "temperature": 0,
+        "top_p": 1,
         "n": 1,
         "stream": True,
-        "presence_penalty": 0.1,
+        "presence_penalty": 0,
         "frequency_penalty": 0,
     }
     headers = {