Verdict
QuillBot’s AI detector has a fantastic false positive performance, but the detection accuracy is too unreliable to trust for anything serious. If you need a free, low-stakes sanity check on a piece of writing and you care more about not falsely accusing a human writer than about catching every instance of AI content, QuillBot is worth a try. For anything other than that, the detection leaves too much to be desired.
Have you tried QuillBot’s AI Detector? Share your results and experience in the comments below.