GPTHuman review
ToolGPTHumanVerdict
A clear three-step plan ladder with stated per-output caps and a mid-range monthly pool, no named modes, and a price page that shows a dollar sign without saying which dollar
- Best for
- Writers who want 25,000 words a month at a yearly rate under $9 and can work in pieces of 1,000 words or less
- Main limitation
- The free trial is 300 words of output in total, which is one paragraph set and no second look, and the pricing page states no currency code for a company based in Canada
- Plan limit
- 300 words free, 1,000 on Starter, 1,500 on Plus, 2,500 on Unlimited
Plans and limits
| Plan | Price | Words per output | Words of output per month | Checked on |
|---|---|---|---|---|
| Free | $0 | 300 | 300 in total | 9 November 2026 |
| Starter | $15.00 a month, or $8.25 a month billed yearly as $99.00 | 1,000 | 25,000 | 9 November 2026 |
| Plus | $25.00 a month, or $14.00 a month billed yearly as $168.00 | 1,500 | 60,000 | 9 November 2026 |
| Unlimited | $49.00 a month, or $26.00 a month billed yearly as $312.00 | 2,500 | Unlimited, subject to the vendor's abuse guardrails | 9 November 2026 |
Three things stand out against the other eleven tools in the reviews hub. First, the yearly Starter rate of $8.25 for 25,000 words sits close to Walter Writes AI's Starter at $8 a month billed yearly for 30,000 words with a 750-word request cap, checked on 8 November 2026; GPTHuman gives 5,000 fewer words and 250 more per request. Second, the monthly Starter rate of $15.00 is in the middle of the range: Undetectable AI's entry plan is $9.99 monthly for 10,000 words and StealthGPT's Pro is $29.99 monthly for 50,000, both checked on 9 November 2026. Third, the 300-word trial is the same size as Walter Writes AI's and larger than Undetectable AI's 250 words, checked on 8 November 2026, but it is a one-off allowance rather than a monthly one.
The pricing page shows monthly and yearly toggles side by side, with the yearly saving advertised at up to 45 percent, read 9 November 2026. Both figures are in the served page, so both are quoted.
The currency point is small and worth stating once. Every price on the page is shown with a dollar sign and no code, and the footer gives a Montreal, Quebec address, read 9 November 2026. A buyer outside Canada should confirm whether the charge is in US or Canadian dollars at checkout.
What it did to our text
Does GPTHuman work?
GPTHuman offers a 300-word free trial and a Starter plan of 25,000 words a month at $15.00 monthly or $8.25 a month billed yearly, with a 1,000-word cap per output, read on its pricing page on 9 November 2026. This GPTHuman review covers the plan ladder, what the vendor states about its output, and where the tool sits in the full humanizer ranking under one published method.
What does GPTHuman itself claim?
GPTHuman's pricing page lists a guarantee against AI detectors on every plan, marked with an asterisk, and describes a paid-plan feature it calls Shield Guard as an added protection layer that helps preserve the human-style masking of AI content (GPTHuman pricing page, read 9 November 2026). The same page states that the free trial includes limited use of the vendor's own AI detector, read 9 November 2026. This site does not repeat the guarantee as a finding, and vendor detectors are never used here as evidence of a pass.
The page is specific about how it counts words, which is useful. Words per month means words of humanizer output in a billing cycle, and words per output means the maximum length of a single result, read 9 November 2026. A 1,200-word input on Starter therefore goes through in two pieces, and both pieces count against the 25,000.
What does the research say about paraphrased text?
Weber-Wulff and colleagues tested 14 AI text detectors and found every one below 80 percent accuracy, with accuracy falling further on paraphrased and machine-translated text (Weber-Wulff et al. 2023, International Journal for Educational Integrity, read 9 November 2026). Krishna and colleagues showed that a paraphrase model dropped DetectGPT's detection rate from 70.3 percent to 4.6 percent at a 1 percent false positive rate (Krishna et al. 2023, arXiv, read 9 November 2026).
Detector makers train against that result. Originality.ai states that its 3.0.2 Turbo model, released September 2025, reached up to 97 percent accuracy on the latest AI humanizers and bypassers with a false positive rate of 1.5 percent (Originality.ai accuracy page, read 9 November 2026). The same page states the vendor's view that detection scores alone should not decide academic honesty cases, read 9 November 2026. No detector score should be the only evidence in a misconduct case.
What none of those pages measure is whether the rewrite kept the writer's claims. That is why the method on this site weights meaning kept at 35 points of 100, errors added at 20, detector pass rate at 30 and limits and access at 15.
What this GPTHuman review draws on
Everything above comes from the vendor's pricing page, Originality.ai's published page and the two studies linked. The run figures, when published, sit on the method page and in this review, with the raw outputs free to download.
What does GPTHuman change in your text?
The pricing page names no rewrite modes. Shield Guard is described as a protection layer on paid plans rather than a setting the user chooses, read 9 November 2026, so there is no documented default and strongest pair to run as two rows. The site's protocol runs each tool on its default setting and, where a stronger documented mode exists, that mode as a second row; for GPTHuman the run uses whatever the interface shows on the run date and records the name in the raw files.
The page also lists watermark removal for two named chatbots and support for more than 50 languages, read 9 November 2026. The method scores neither language coverage nor watermark claims, so those features are recorded and not rated.
What a humanizer in this category does is paraphrase: substitute words, reorder clauses, vary sentence length and shift tone. The reader-side costs the method rates are claims dropped, claims invented, grammar errors introduced per 100 words, and readability change. Those figures appear here once a run is published.
| What the vendor states | What the method measures |
|---|---|
| No modes named; Shield Guard layer on paid plans | Default setting run; strongest documented mode where one exists |
| 1,000 words per output and 25,000 a month on Starter | Whether a 350 to 500 word input fits the plan, scored under limits and access |
| Guarantee against AI detectors, with an asterisk | Share of outputs labelled human across five named detectors, per detector and pooled |
| Built-in AI detector, limited on the free plan | Noted, not scored; vendor detectors are never used as evidence of a pass |
Who should use GPTHuman?
Choose GPTHuman if 25,000 words a month in pieces under 1,000 words fits your work and you will pay $99.00 for a year to get the $8.25 rate; at $15.00 monthly the plan is less distinctive. The per-output caps are stated plainly on every tier, which makes the plan easy to size.
Look elsewhere if you want to compare paid output before buying, because 300 trial words is one look: the Clever AI Humanizer review covers a free tool with a 3,000-word request cap and no sign-up, checked on 8 November 2026. If you prefer to be metered by request rather than by word, the WriteHuman review covers a rival whose Basic plan gives 80 requests of 600 words for $12 a month billed yearly, read on 9 November 2026. Anyone writing for a class should read their institution's AI policy first; a humanizer does not make undisclosed AI use acceptable.
GPTHuman is compared on the same fields in WriteHuman vs GPTHuman and sits with all twelve tools in the full humanizer ranking.
Questions about GPTHuman
Is GPTHuman free?
Only as a trial: the free plan gives 300 words of humanizer output in total, at up to 300 words per output, read on the pricing page on 9 November 2026.
How much does GPTHuman cost per month?
Starter is $15.00 a month billed monthly or $8.25 a month billed yearly as $99.00, Plus $25.00 or $14.00 ($168.00 a year), and Unlimited $49.00 or $26.00 ($312.00 a year), all read on 9 November 2026.
What is the GPTHuman word limit?
1,000 words per output on Starter, 1,500 on Plus and 2,500 on Unlimited, with 25,000 and 60,000 words of output a month on the first two and unlimited output subject to the vendor's abuse guardrails on the third, read on 9 November 2026.
What currency does GPTHuman charge in?
The pricing page shows a dollar sign with no currency code and the company gives a Montreal, Quebec address, read on 9 November 2026, so confirm USD or CAD at checkout before paying.
Does GPTHuman work on Turnitin?
No tool can promise that: Turnitin's detector is not available to the public, so this site reports only what Turnitin publishes and what peer-reviewed studies found about paraphrased text, never a Turnitin pass or fail.
Related reading
Grammarly AI Humanizer review: does it work?Does Grammarly humanizer work? Free and Pro limits checked on a stated date, the four voices it offers, what.
GPTinf reviewGPTinf reviewed on the same fields as every humanizer we list: the $4.99 Lite plan, 5,000 humanizer words a.
Best AI humanizer: 12 tools, one published methodBest AI humanizer by one published protocol: meaning kept, errors added, detector readings and plan limits.
How we test AI humanizersThe full humanizer test: 24 AI inputs and 6 human controls, five named detectors, a meaning rubric, published.