We've implemented DetectGPT paper in Pytorch. Our implementation can be found below

Github: https://github.com/BurhanUlTayyab/DetectGPT

Website: https://gptzero.sg

Discord: https://discord.com/invite/F3kFan28vH

We're also working on a GPTZerov2 (inspired by LLM based transformers and GANs), which would be more accurate, and can detect lines changed by humans.

Please give some feedback on our work.

Thanks