Update app.py

app.py

@@ -32,7 +32,7 @@ def respond(
     # Stream the response from OpenAI
     response = ""
     for chunk in client.chat.completions.create(
-        model="gpt-4",  # or "gpt-3.5-turbo"
+        model="deepseek-ai/DeepSeek-V3",
         messages=messages,
         max_tokens=max_tokens,
         temperature=temperature,