Starting price
$12/mo
Free tier
200 words
Founded
2023
What GPTinf does
GPTinf is a humanizer tool. Marketed as being trained directly against detector models rather than general paraphrasing, which independent testers cite as the reason its scores hold up on technical text.
Pricing: From $12/mo, scaling with monthly word volume.
Bundled AI detector: No — pair with a standalone detector like GPTZero or Originality.ai
Strengths and weaknesses
What works
- Eight distinct rewriting modes (Academic, Formal, Informal, Creative, Simple, Standard, Expand, Shorten)
- Freeze-keyword feature protects technical terms and proper nouns from being altered
- Selective, sentence-level rephrase instead of forcing a full rewrite
What to watch for
- No bundled plagiarism or AI detector — pair it with a separate checker
- Mode selection has a learning curve for first-time users
Our verdict
GPTinf is best for: Writers who want granular control over tone and which specific sentences get rewritten.
Who GPTinf is (and isn't) right for
Based on our testing notes, GPTinf fits users whose top priority matches its core design. Marketed as being trained directly against detector models rather than general paraphrasing, which independent testers cite as the reason its scores hold up on technical text. If your priority is a different tradeoff — price, bundled features, or language coverage — one of the alternatives below may fit better.
Frequently asked questions
Is GPTinf free to use?
GPTinf offers a free tier of 200 words before you need to sign in or upgrade.
Does GPTinf include an AI detector?
No — pair with a standalone detector like GPTZero or Originality.ai.
How much does GPTinf cost?
From $12/mo, scaling with monthly word volume.