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GPTZero

AI Productivity

GPTZero is an AI content detector used by over a million people, analyzing perplexity and burstiness to judge text origin, with sentence-level highlighting, batch scanning, browser extension, and API. Free tier covers 10,000 words monthly.

Verification level not recorded · · Submit a correction

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Editor's note

Good for teachers, editors, recruiters, and organizations needing content verification at scale; not suitable as the sole basis for high-stakes rulings.

Decision facts

“Not verified” means evidence is insufficient, not that the capability is absent.

Evidence statusVerification level not recorded
PlatformsNot verified
AvailabilityAvailable
Chinese UINot verified
Mainland ChinaNot verified
Commercial useNot verified

What is GPTZero

GPTZero is an AI content detector used by over a million people, analyzing perplexity and burstiness to judge text origin, with sentence-level highlighting, batch scanning, browser extension, and API. Free tier covers 10,000 words monthly.

Key features of GPTZero

  • Teachers detecting AI-generated content in student work
  • Editors and journalists verifying submission originality
  • Recruiters screening AI-written resumes and cover letters
  • Organizations batch-reviewing reports, contracts, and emails via API

Good for

  • Interpretable perplexity-and-burstiness methodology
  • Sentence-level highlighting enables precise review
  • Complete ecosystem: education platform, Chrome extension, Word add-in, API

Watch out

  • Error rates mean major conclusions need human review
  • Heavily rewritten AI text can evade detection
  • The free 10,000-word monthly quota is tight for heavy users

How to use GPTZero

  1. Register and log in at gptzero.me
  2. Paste text or upload a PDF, Word, or txt file
  3. Click scan to start the analysis
  4. Review the overall verdict and sentence-level highlights
  5. Optionally run AI vocabulary analysis and plagiarism checks

Who GPTZero is for

Difficulty: Beginner

  • Teachers detecting AI-generated content in student work
  • Editors and journalists verifying submission originality
  • Recruiters screening AI-written resumes and cover letters
  • Organizations batch-reviewing reports, contracts, and emails via API

FAQ

What does GPTZero's free tier include?

The free plan scans 10,000 words per month with 10 batch files; the $10/month starter plan covers 150,000 words, and the $16/month premium plan covers 300,000 words with unlimited batch scanning.

How does GPTZero detect AI text?

It analyzes perplexity (complexity and unpredictability) and burstiness (variation in sentence structure and length); human writing tends to be more varied.

Can results be treated as final verdicts?

Not recommended. AI detection has error rates — treat results as reference and add human review for high-stakes decisions.

Sources and verification

Evidence status: Verification level not recorded

Sources: gptzero.me (opens in a new tab)
Content reviewed: · Submit a correction →

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