Stylometry is extremely sophisticated even with simple n-gram analysis. There's a demo of this that can easily pick out who you are on HN just based on a few paragraphs of your own writing, based on N-gram analysis.
You can also unironically spot most types of AI writing this way. The approaches based on training another transformer to spot "AI generated" content are wrong.
https://news.ycombinator.com/item?id=33755016
You can also unironically spot most types of AI writing this way. The approaches based on training another transformer to spot "AI generated" content are wrong.