in my experience it's not a decent scanner, it has a lot of false negatives, so I would just avoid using it
gptzero is the one that has given me the most satisfaction at the moment, exactly the best even if you can't use it much, since it requires payment
but couldn't theymos buy it and use the API to check every post inserted? is bad idea?
Yes, you cannot use Sapling AI in isolation for a single post, but it is good at detecting humanized and similar posting styles. Your suggestion of using an API is good, but it has to be a combination of at least two detectors. IMO, Copyleaks + GPTZero. It will create some barrier to AI spam for sure.