Is Originality AI accurate? Some people say yes, and some people say no.

I watched a YouTube video of a guy putting in a paragraph into the detector that he used Chat-GPT to generate and the site had a result of 100% confidence in it being written by ai. Then he put his own paragraph that he made by himself into the detector and it came back with a 100% written by human result. It also says on the website that it has 99+% accuracy with a 3% false positive rate. On its website, it says that it is the most accurate and reliable ai detection tool.

*EDIT: I just put this post that I had just made into the detector and I think I just answered my own question. It said that it was 100% confident that I used ai. This can’t be real lol. Is there actually any semi-accurate ai detector tool? EDIT: The only accurate ai detection tool for my post here was GPT-Zero. Has anyone had any accuracy using that tool?