GPTZero
Educator-first detector with the lowest false-positive rate in independent tests.
GPTZero rose to prominence as the detector schools reached for first. It scores documents at the sentence level, so you can see exactly which lines tripped the model rather than just getting a single percentage. Independent benchmarks put its accuracy between 84% and 99% depending on the test, and its false-positive rate is the lowest of the mainstream tools, which matters enormously in education where a wrong flag can damage a student. A free tier covers 10,000 characters per scan, and the Pro plan adds batch uploads and an API.
| Best for | Teachers, professors, and academic integrity offices |
|---|---|
| Pricing | Free / Pro $10 per month |
| Category | AI Detectors |
Highlights
- Sentence-level highlighting
- Lowest false-positive rate
- LMS integrations