Update app.py

app.py

@@ -59,7 +59,7 @@ def respond(message, history, system_prompt, image=None):
 
     try:
         responsed = client.chat.completions.create(
-            model="deepseek-v3",
+            model="gpt-4",
             messages=messages,
             temperature=0.8,
             top_p=0.95,