Update app.py

app.py

@@ -79,7 +79,7 @@ if is_valid_username(user_id):
             VISION_PROMPT_MESSAGES.append({"role": "user", "content": encoded_image})
 
         params = {
-            "model": "gpt-4o",
+            "model": "gpt-4o-mini",
             "messages": VISION_PROMPT_MESSAGES,
             "max_tokens": 3000, # 1024,
         }