Last updated 08-21-2026
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gptkit.ai
GPTKit checks whether a passage was written by a human or generated by ChatGPT. Paste text or upload a file, and six detection models return a verdict plus an authenticity report for research, editorial, and hiring workflows.
Most detectors lean on one scoring method, which makes them easy to fool with light edits. GPTKit stacks six approaches and reports roughly 93% accuracy on a 100K-response test set trained on one million samples. That multi-model setup is the main reason to pick it over simpler checkers when a wrong call would actually matter.
Teachers, editors, freelancers, and hiring teams use it to screen essays, cover letters, and client drafts. Guest checks cover the first 2,048 characters with no account. Registered users get the same per-request limit on the free tier, and paid credit plans unlock longer scans through the Upgrade flow.
Runs six separate AI detection methods on every submission instead of one score
Reports roughly 93% accuracy on a 100K-response benchmark dataset
Guest users can scan up to 2,048 characters without creating an account
Supports file uploads alongside pasted text for batch-style checks
Team workspaces let members share credits across invited collaborators
English-only detection today, with API docs for programmatic access
Combines six detection methods instead of relying on a single model score.
No account required for quick guest scans up to 2,048 characters.
Team workspaces let groups pool credits for shared screening workflows.
English-only detection limits use for multilingual content teams.
Free tiers cap each request at 2,048 characters unless you buy credits.
Screenshot capture hit Cloudflare challenges during testing, suggesting occasional access friction.
Is GPTKit free to use?
Yes. GPTKit lets guest users scan the first 2,048 characters of each request for free. Free registration keeps the same 2,048-character limit per request, and paid credit plans are available through the Upgrade page for longer documents.
How accurate is GPTKit?
GPTKit reports about 93% accuracy based on testing with a dataset of more than 100,000 human and ChatGPT responses. The detector is trained on one million samples and combines six different analysis methods on each submission.
How does GPTKit detect AI text?
GPTKit analyzes submitted text with six different detection techniques rather than a single model. Each run returns an authenticity or reality rate so you can see how confident the combined verdict is.
Can teams share GPTKit credits?
Yes. GPTKit lets you create a team, invite members, and pool credits across the group. Shared credits apply to every teammate on that workspace.
What languages does GPTKit support?
GPTKit supports English only. Paste or upload English text for detection; other languages are not listed as supported on the site.
Does GPTKit store my submitted text?
GPTKit temporarily stores input only while processing a detection request. Once the analysis finishes, the content is removed from its servers according to the site FAQ.