Thanks for mentioning this. I always find it unsettling when I've researched solutions for something and only find a better option from a random HN comment.
Site: https://kubb.dev/
This project seems to be mostly AI generated, so keep that in mind before replacing any existing solutions.
Fwiw I tried every tool imaginable a few years ago including kubb, (which I think I contributed to while testing things out)
The only mature, correct, fast option with a fixed cost (since it mostly exists at the type level meaning it doesn't scale your bundle with your API) was openapi-ts. I am not affiliated other than a previous happy user, though I did make some PRs while using it https://openapi-ts.dev/