Update app.py

app.py

@@ -216,7 +216,7 @@ else:
             # Make the API call with better error handling
             try:
                 response = client.chat.completions.create(
-                    model="gpt-4",
+                    model="gpt-4o",
                     messages=messages,
                     temperature=0.7,
                     max_tokens=1500