GPTZero

Key facts: GPTZero is an AI detection tool for education and publishing: paste text or upload a document and it estimates whether it was written by a human or generated by AI, with sentence-level highlighting and a report you can share. It also offers writing feedback and an authorship tool that tracks how a document was written.

Plans: GPTZero has a free plan with limited scans, and paid plans that raise scan limits and add features for educators and teams. Check the official pricing page for current scan allowances.

Best for: teachers, editors and hiring teams checking the provenance of submitted text. Watch out: detectors are probabilistic, not proof — a flagged passage needs a conversation with the author, not an automatic verdict, especially for non-native English writers. Who should skip it: anyone who wants a definitive verdict for high-stakes decisions without human review, since no detector gives proof.

Pros

• Estimates whether text was written by a human or generated by AI, from pasted text or an uploaded document.
• Sentence-level highlighting shows exactly which passages look AI-generated.
• Produces a report you can share, useful for teachers, editors and hiring teams.
• Adds writing feedback and an authorship tool that tracks how a document was written.

Watch out for

• Detectors are probabilistic, not proof: a flagged passage needs a conversation with the author, not an automatic verdict.
• Results need extra care for non-native English writers, who can be flagged unfairly.
• The free plan has limited scans, so regular checking needs a paid plan.

Pricing

GPTZero has a free plan with limited scans, and paid plans that raise scan limits and add features for educators and teams. Check the official pricing page for current scan allowances, as they change.

FAQs

Is GPTZero proof that text is AI-generated? No, it estimates likelihood; detectors are probabilistic, not proof, so a flagged passage needs a conversation with the author.

What can I check with GPTZero? You can paste text or upload a document, and it highlights sentences and produces a shareable report.

What is the authorship tool? It tracks how a document was written, giving extra context beyond a single detection score.

Is there a free plan? Yes, with limited scans; paid plans raise scan limits and add features for educators and teams.