Most likely this method https://arxiv.org/pdf/2301.10226 (EDIT: and Google's SynthID paper which builds on it https://www.nature.com/articles/s41586-024-08025-4)
If different model providers use different green logits, does that mean they can only tell if the text came from their own model?
loading story #49257323
That "just add a constant to the green logits" as a fix to the entropy problem is so elegant I love it.