AI Credits

I have created a free studio account and started to build app. I moved over to the $19 for the Studio standard for one month so I can use a custom domain.

During my building, I ran out of AI credits. I have had to buy 100 AI credit block at $5 a few times. Those credits have gone fast. For example, one block of 100 was used in 2-3 AI build prompts. One of those build prompts used a whopping 39 AI credits.

How does a single AI prompt use 39 AI credits?  Is there something I can do to be more efficient with AI prompts?