I checked this tool on some of my comments. Mostly it reported around "100% real". However https://news.ycombinator.com/item?id=35259575 this comment was generated by ChatGPT and it was also reported as 97.6% real. And this comment: https://news.ycombinator.com/item?id=35286822 was reported as 88.79% fake but I wrote it myself. So I wouldn't trust this tool too much, even from my very limited testing it wasn't very reliable.