Update app.py

app.py

@@ -50,7 +50,7 @@ Based on the context above, generate a traffic optimization strategy.
 def get_optimization_recommendation(prompt: str) -> str:
     response = client.chat.completions.create(
         messages=[{"role": "user", "content": prompt}],
-        model="llama-3-70b-versatile",
+        model="gpt-3.5",
         stream=False
     )
     return response.choices[0].message.content