Update app.py

app.py

@@ -139,7 +139,7 @@ def chat_logic(message, history):
     payload_messages.append({"role": "user", "content": message})
     
     payload = {
-        "model": "Qwen/Qwen2.5-VL-3B-Instruct",
+        "model": "Qwen/Qwen2.5-7B-Instruct",
         "messages": payload_messages,
         "parameters": {"max_new_tokens": 512, "temperature": 0.7}
     }