Update app.py

app.py

@@ -198,7 +198,7 @@ Answer:"""
 
         if hasattr(client, "chat") and hasattr(client.chat, "completions"):
             chat_resp = client.chat.completions.create(
-                model="mixtral-8x7b-32768",
+                model="llama-3.1-8b-instant",
                 messages=[
                     {"role": "system", "content": "You are a strict assistant that only uses provided context."},
                     {"role": "user", "content": prompt}