I wonder if you're stuck on an older model like GPT-4o?

EDIT: I think that's likely what is happening here: I tried the prompt against GPT-4o and got this https://chatgpt.com/share/68b8683b-09b0-8006-8f66-a316bfebda...

My consistent position on this stuff is that it's actually way harder to use than most people (and the companies marketing it) let on.

I'm not sure if it's getting easier to use over time either. The models are getting "better" but that partly means their error cases are harder to reason about, especially as they become less common.