GPTZero

GPTZero was one of the first dedicated AI text detectors, launched by a Princeton student in January 2023. It analyzes perplexity and burstiness patterns to classify text as human or AI-written. The tool is used by some universities alongside or instead of Turnitin, and student reports on its accuracy range widely.

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What Students Are Asking

How does GPTZero compare to Turnitin?

GPTZero tends to be more aggressive in flagging text as AI-generated, leading to more detections but also more false positives. Turnitin is generally considered more conservative. Many students report different results from each tool on the same text.