| GPTinf | WriteHuman AI | |
|---|---|---|
| Starting price | $12/mo | $8/mo |
| Free tier | 200 words | 100 words |
| Bundled detector | No | No |
| Founded | 2023 | 2023 |
| Best for | Writers who want granular control over tone and which specific sentences get rewritten. | Students who want an accessible entry point but should verify output with a second detector before submitting anything. |
Price: WriteHuman AI is cheaper to start, at $8/mo vs $12/mo.
GPTinf: From $12/mo, scaling with monthly word volume.
WriteHuman AI: From roughly $8/mo; 'Enhanced Model' available as a paid upgrade.
Free tier: GPTinf offers a more generous free tier (200 words).
If you just want to test either tool before paying, GPTinf's 200-word allowance gives you more room to evaluate quality.
Detection performance
GPTinf: 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.
WriteHuman AI: One of the more heavily marketed student-focused tools, though third-party detector testing found inconsistent results even on the paid tier.
AI detector included: Neither tool bundles a built-in detector — pair either with GPTZero or Originality.ai.
Strengths at a glance
GPTinf
- 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
WriteHuman AI
- Retry option lets you regenerate a rewrite if the first pass reads oddly
- Enhanced Model shows measurable improvement over the base tier
Our verdict
Choose GPTinf if: writers who want granular control over tone and which specific sentences get rewritten. Choose WriteHuman AI if: students who want an accessible entry point but should verify output with a second detector before submitting anything.