Not sure how relevant it is, but I finally decided to dip my toes in last night and write my first agent. Despite paying for ChatGPT Pro, Claude Pro, etc, you still have to load up credits to use the API version of them. I started with Claude, but there was a bug on the add credit form and I couldn't submit (I'm guessing they didn't test on MacOS Safari, maybe?). So I gave up and moved on to OpenAI's developer thing.
Maybe they should do less vibe coding on their checkout flow and they might have more users.