Does SuperHumanizer bypass GPTZero? The vendor built the tool against GPTZero and said so — then published 11 samples, no screenshot, and a number lower than the one on its homepage.
The only tool that bypassed Pangram and Turnitin in 2026.
Most humanizers clear one detector and get caught by the other. StealthWriter is the one that gets past both — run Ghost 5.2 Pro at level 7–8, section by section, and re-check before you submit.
Try StealthWriter →Key Takeaways
- Unlike the Turnitin question, GPTZero is in SuperHumanizer’s stated training set — the vendor said so itself, in public.
- Verbatim: “We built SuperHumanizer based on our own AI detector, as well as ZeroGPT and GPTZero, to test its capabilities.”
- The same disclosure gives the sample: 11 samples of AI text, producing “up to a 95% bypass rate” — not the 97% the homepage advertises.
- Anyone can check this for free. GPTZero accepts 10,000 characters with no account at all. There is no access excuse for a missing screenshot.
- SuperHumanizer publishes no GPTZero screenshot, and its own users report the opposite: 18.1% AI on ZeroGPT and 49% human on GPTZero.
- GPTZero names nine humanizers by name in its own February 2026 paper. SuperHumanizer is not one of them — it has never been tested.
- Its Terms disclaim being “always undetectable”, and still contain the template placeholders “[Insert Country/State]”.
The only tool that bypassed Pangram and Turnitin in 2026.
Most humanizers clear one detector and get caught by the other. StealthWriter is the one that gets past both — run Ghost 5.2 Pro at level 7–8, section by section, and re-check before you submit.
Try StealthWriter →Does SuperHumanizer bypass GPTZero?
This is a different question from the Turnitin one, and the difference is worth stating first.
When we asked whether SuperHumanizer bypasses Turnitin, the vendor’s own answer was that it does not consider Turnitin a common detector and never trained against it. GPTZero is the opposite case. It is named, by the vendor, as a tool the product was built and tested against:
— the account that operates r/SuperHumanizer, quoted verbatim
So the tool has a genuine claim to relevance here that it does not have against Turnitin. What it does not have is evidence.
This page reports no first-party test; everything below was fetched on 3 September 2026.
Why the missing screenshot matters more here
With Turnitin, every vendor in this market has an excuse: Turnitin sells no individual licences and shows students no AI report, so nobody outside an institution can produce a genuine screenshot.
GPTZero removes that excuse entirely. Anyone can paste up to 10,000 characters into gptzero.me right now with no account and no payment. A free account raises the per-scan limit to 150,000 characters with a 10,000-word monthly quota. Paid tiers start at $9.99 a month.
A vendor that built its product against GPTZero, ran internal tests against GPTZero, and advertises a bypass rate could have published a screenshot in the time it takes to make coffee. SuperHumanizer publishes none.
It is also worth knowing what a genuine current GPTZero result looks like, so you can judge anyone else’s screenshot: it shows a three-class classification (human, AI or mixed), a confidence category rather than a bare percentage, a probability breakdown across all three classes, and sentence-by-sentence highlighting. An image showing only “X% AI”, or one displaying perplexity and burstiness, is either fabricated or dates to roughly 2023.
Which number is the real one?
| Where it appears | The claim | Evidence attached |
|---|---|---|
| Homepage | 97% success rate bypassing AI detection | None |
| Pricing page | Bypass All AI Detectors including GPTZero | None |
| Vendor’s own disclosure | “up to a 95% bypass rate” | 11 samples, graded partly by its own detector |
| Terms of Service §3 | Not guaranteed “always undetectable by AI detection tools” | — |
| Terms of Service §6 | No guarantee output meets expectations “including detection outcomes” | — |
Three claims for one property, and the only one with a stated method is the smallest. Eleven samples is not a benchmark; it is a smoke test. And grading partly with the vendor’s own detector means part of the result measures agreement between two products from the same company.
Note the direction of the discrepancy too. The disclosed test produced up to 95%. The homepage advertises 97%. The number went up after the methodology was left behind.
What do users actually report?
The two most detailed organic reports both describe the tool failing against detectors it was explicitly built against.
In May 2026, a poster reported Super Ultra output scoring 18.1% AI on ZeroGPT and 49% human on GPTZero, and published the source text. Forty-nine percent human is not a pass; it is a coin flip that a marker would read as suspicious.
In August 2026, another wrote that the humanizer “does not pass ai detectors (zerogpt, originality, gptzero) anymore”, posting a sample that came back “100% ai detected even after humanizing.”
Both concern the exact detectors named in the vendor’s development disclosure. That is the least favourable place for a tool to be reported failing.
Has GPTZero tested it?
No — and unlike Turnitin, GPTZero does name names.
Appendix M of GPTZero’s own February 2026 paper lists nine bypass services by name. SuperHumanizer is not among them. It is also absent from Pangram’s DAMAGE paper and from Pangram’s August 2025 benchmark.
That paper is also a GPTZero preprint, not peer-reviewed work, and GPTZero has an obvious interest in the result.
How good is GPTZero, actually?
Worth knowing, because it cuts against both sides here.
GPTZero’s own FAQ concedes: “Our classifier is not trained to identify AI-generated text after it has been heavily modified after generation.” Its developers page simultaneously claims a “Paraphraser Shield” means “even if AI content has been altered to look more human-like, GPTZero can detect it.” Both statements are currently published.
The two leading detector vendors publish flatly opposite numbers. GPTZero’s paper reports 93.5% recall on 1,000 texts run through nine bypasser services, putting Pangram at 49.7%. Pangram’s DAMAGE paper reports GPTZero at 60.04% on humanized text, and 34.53% at GPTZero’s own default threshold. Each vendor’s benchmark shows that vendor winning.
The one third-party figure, from Russell, Karpinska and Iyyer, is widely quoted as “GPTZero catches only 46% of humanized text” — but that is one cell of one table, n=30, and the “humanizer” was a research prompt the authors wrote themselves, not a commercial tool. In the same table GPTZero scored 100% on paraphrased text and 85.3% overall at a 0.7% false positive rate. We flag this because the 46% figure circulates constantly in vendor marketing without those qualifiers.
What should you take from this?
SuperHumanizer has a real claim to being built for this fight and no evidence that it wins it. The vendor named GPTZero as a development target, disclosed a test of eleven samples, advertised a higher number than that test produced, published no screenshot of a detector anyone can use for free, and disclaimed detection outcomes in its terms.
Its users, meanwhile, report GPTZero returning 49% human and 100% AI on humanized output.
The practical point is that you can settle this yourself in two minutes, for nothing, which is not true of Turnitin. Paste the output into gptzero.me before you rely on it — and remember the detector is imperfect in both directions.
If your real worry is being wrongly flagged on your own writing, keep your drafting history — it costs nothing and it survives a detector being wrong. It matters most for the writers detectors treat worst: ESL writers and AI detection and false positives for neurodivergent students. Check before you submit with the best pre-submission check and the Turnitin self-check, and strip the obvious tells by hand first via what to remove before using an AI humanizer.
For the product itself see our SuperHumanizer review, and the companion pages on Turnitin and Pangram. For the detector itself, see the Pangram review.
Get the free prompt pack instead
The manual rewriting prompts that lower AI signals without a subscription — and without betting a submission on a number nobody has reproduced. Free, no card.
Frequently asked questions
Does SuperHumanizer bypass GPTZero?
Its vendor says it was built against GPTZero, which is a stronger starting position than most tools in this market can claim. But the only figure attached to that work is 11 samples yielding “up to a 95% bypass rate”, no screenshot has ever been published, and the two most detailed organic user reports both describe GPTZero flagging the output.
What exactly did the vendor say?
In its own subreddit: “We built SuperHumanizer based on our own AI detector, as well as ZeroGPT and GPTZero, to test its capabilities… Based on our internal tests using 11 samples of AI text, we achieved up to a 95% bypass rate.” GPTZero is named as a development target, not just a marketing claim — which makes the absence of any published result stranger, not less so.
Why does the missing screenshot matter more here than for Turnitin?
Because GPTZero is free and public. Anyone can paste up to 10,000 characters into gptzero.me with no account, and a free account raises that to 150,000 characters per scan. With Turnitin, vendors could argue no consumer can obtain a score. With GPTZero there is no such argument — a screenshot would take two minutes.
Where does the 97% figure come from?
Marketing copy. The homepage advertises a “97% Success Rate in Bypassing AI Detection” with no source, method, sample size or date. The vendor’s own disclosure describes something smaller and different: 11 samples, graded partly by its own detector, producing “up to a 95% bypass rate.” Two numbers, and the one with a method attached is the lower one.
Has GPTZero tested SuperHumanizer?
No. GPTZero’s February 2026 paper names nine bypass services in an appendix table — GPTinf, Grubby AI, HIX, Quillbot, StealthGPT, StealthWriter, TwainGPT, Undetectable and WriteHuman. SuperHumanizer is not among them. Note also that the table’s ratings describe those tools’ ability against “naive AI detectors”, not against GPTZero itself.
What do actual users report?
Not what the marketing promises. In May 2026 a poster reported Super Ultra output scoring 18.1% AI on ZeroGPT and 49% human on GPTZero, with the source text published. In August 2026 another wrote that the humanizer “does not pass ai detectors (zerogpt, originality, gptzero) anymore”, posting a sample that came back “100% ai detected even after humanizing.” Both concern detectors the tool was explicitly built against.
What do the Terms say?
That output is not guaranteed to be “always undetectable by AI detection tools”, and that the service does not guarantee output will meet expectations “including detection outcomes.” The same document still reads “the laws of [Insert Country/State]” and “the courts of [Insert Jurisdiction]” — placeholders live eleven months after the stated effective date.
Who operates it?
KamranAli Limited, UK company number 13008281, registered at 12 Constance Street, London E16 2DQ, incorporated 10 November 2020 with a sole director resident in Pakistan. The website discloses only the company name. Its Chrome extension has 1 user and 0 ratings.
