GPTZero cannot work because they don’t have all of the logits used to judge perplexity. They only have the top five or so. Even OpenAI which has the full set of

GPTZero cannot work because they don’t have all of the logits used to judge perplexity. They only have the top five or so. Even OpenAI which has the full set of logits is not able to correctly classify all texts. It’s a futile effort.