GPTZero
Detector for AI-generated writing
The Four Mismatches · GPTZero
Fits on everything we could check
For a student in the United States, the country it was built for.
CurriculumNo exam claimed
It names no school exam, so this counts neither for nor against it.
- The maker names no exam
LanguageFits
Teaches in the classroom languages of the United States.
- The maker lists: English, German, Portuguese, French, Spanish
- Classrooms in the United States use: English
DeviceFits
Works on a laptop or tablet, what most students in the United States use.
Independence: our publisher builds learning products too. We never review or score its products, and no tool pays to be listed or to rank higher — how we assess fit.
What it does
What the AI actually does — A classifier scoring text on 'perplexity' (predictability) and 'burstiness' (sentence-to-sentence variation), with sentence-level highlighting.
Why it was built — Tell whether text was written by a human or an LLM, for academic integrity, hiring and publishing.
Who built it
- Company
- GPTZero
- Founders
- Edward Tian · Alex Cui
- HQ / origin
- New York City, USA
- Founded
- 2023
- Model
- B2B / B2C
- Languages
- English
- Pricing
- Freemium + API
We record durable facts only — no funding-raised or user-count figures. Unverified fields are marked [TBD] rather than guessed.
Where it sits
GPTZero is on the Learning Tools Index, in assessment & academic integrity, built in United States.