Update app.py

app.py

@@ -32,7 +32,7 @@ Be concise and limit your response to 512 tokens or less."""
     try:
         # Call the OpenAI API
         response = client.chat.completions.create(
-            model="gpt-4",  # Replace with "gpt-3.5-turbo" if needed
+            model="gpt-4o-mini",  # Replace with "gpt-3.5-turbo" if needed
             messages=[
                 {"role": "system", "content": "You are a helpful and knowledgeable digital marketing strategist."},
                 {"role": "user", "content": prompt},