GPTKit
A multi-model detector that aggregates six detection methods into one verdict.
GPTKit takes a committee approach to detection. Instead of one model making the call, it runs six different AI-detection techniques, from DistilBERT and RoBERTa classifiers to perplexity and GLTR-style predictability scores, then aggregates them into a single confidence report. The pitch is that several weaker signals beat one strong one, and the vendor reports around 93% accuracy on its internal testing. A free guest tier analyzes up to roughly 2,000 characters per request with no account, and registration adds credits and a higher per-request limit, with paid plans that directories list anywhere from about $5 to $20 a month depending on tier and billing cycle. The honest caveats are the same as the rest of the category: the 93% figure is vendor-provided and not independently verified, English is the only supported language, and the tool temporarily stores your text for processing. It is a reasonable free first pass, but like every detector here the score should never stand alone as a verdict.
| Best for | Teachers, students, and editors wanting a free multi-method first check |
|---|---|
| Pricing | Free guest tier (about 2,000 chars/request); paid plans roughly $5-$20 per month |
| Category | AI Detectors |
Highlights
- Six detection methods aggregated
- Free guest tier, no account needed
- Team credit sharing