A friend uses the app Perplexity - he sent some text for a social media post at one time and I had trouble making it align with our site's wording. A search with the text itself only came up with AI responses, so I asked if he'd sent AI text. He said yes, but he'd edited it. Even then, it is distinctive for its lack of citations or quotes, and I wasn't able to use it. As a writer I find this type of program to be an inferior substitute for having a real person write text.

And right now Perplexity is being sued by the New York Times and the Chicago Tribune for the way in which is harvests stuff from their sites and sometimes makes up stuff it attributes to them.