Update app.py

app.py

@@ -787,15 +787,15 @@ def chatbot_fn(user_message, history, image=None):
     messages = system_messages + history + [{"role": "user", "content": user_message}]
 
     payload = {
-        "model": "gpt-5.1-chat-latest",
-        "messages": messages,
-        "temperature": 0.2,
-        "top_p": 1,
-        "n": 1,
-        "stream": True,
-        "presence_penalty": 0,
-        "frequency_penalty": 0,
-    }
+    "model": "gpt-5.1-chat-latest",
+    "messages": messages,
+    "temperature": 0.0,
+    "top_p": 1,
+    "stream": True,
+    "presence_penalty": 0,
+    "frequency_penalty": 0,
+    "n": 1,
+}
     headers = {
         "Content-Type": "application/json",
         "Authorization": f"Bearer {OPENAI_API_KEY}"