My first reaction-thought to seeing this is: implement a GAN with GPT inference on the generator side and this classifier (or DetectGPT or GPTZero, or whatever) they’ve developed as the detector. I would think this would very quickly a) achieve state of the art whatever-the-fool-a-human-reader-test-measurement-is results and b) render the classifier, and any subsequent AI-text-detecting classifier, useless.

I could be way off base with that idea, but it seemed a good enough one to ponder, but not so great I was motivated to do anything more than post the thought.