Worst performance for GPTZero is technical medical papers with a 10% false positive rate. Here’s the study from S. Korea.
Scientific scholarly writing: <4% false positive.
Creative writing is orders of magnitude easier to detect. The biggest problem for AI writing detection tools is the use of translation — so generating text, translating it into another language, and translating it back — but this ends up as a false-negative issue. False positives are very rare.
More importantly, we don’t need GPTZero to detect AI writing because professionals can identify it on sight. Add context clues (students are dumb) and suddenly it’s trivial.
EDIT: I need you to understand that college students are terrible writers. In all my decades and literally thousands of students, I’ve met maybe three undergrads whose writing was more than proficient, and that's in an Ivy League environment. The idea I’m going to mistake your writing for AI (which sounds horrible and robotic, btw) because of its “high quality” is simply unfathomable.