AI Humanizer Rankings (October 2026)

This review was run on 2026-10-22. For each tool, we used the same set of 50 English texts and had the responses evaluated by Pangram, GPTZero, Originality.ai Turbo, Originality.ai 5.0, ZeroGPT and Winston AI. Tools are ordered by average successful (strict) bypass rate. Quality is scored separately, and humanized outputs are not published, so the verdicts below come from the per-detector rates and quality fields only.

Each column counts how many of the 50 texts that detector called human-written. Rank is the average of the six columns. The last row is the untouched source text, scored by the same detectors. Last updated October 22, 2026. Full methodology.

Strict-bypass rate by detector

October 2026 review · 50 texts per tool · highlighted bar = top result per detector

Pangram

GPTZero

Originality.ai Turbo

Originality.ai 5.0

ZeroGPT

Winston AI

1. StealthGPT

Verdict: the strongest all-round result this cycle. StealthGPT passed all 6 detectors on 17 texts, more than any other tool, and was the only one above 40% on Pangram, at 88%. Its weakest detector was Originality.ai 5.0 at 34%, and its quality mean was 83.5%. Best for writers who face Pangram or GPTZero.

2. Undetectable.ai

Verdict: strong on the easier detectors, weaker on quality. Undetectable.ai passed 100% on ZeroGPT and 100% on Winston AI, but 40% on Pangram. We obtained a quality mean of 52.5% and a naturalness mean of 28%. Only for those who face ZeroGPT or Winston AI.

3. WriteHuman

Verdict: near the top on four detectors. WriteHuman reached 100% on Originality.ai Turbo and 90% on GPTZero, but 26% on Pangram. The generated text is closest in length to the input among the top five tools (mean length ratio 1.06). Quality mean: 59%.

4. Rephrasy

Verdict: solid on Winston AI and ZeroGPT, weak on Originality.ai 5.0. Rephrasy passed 100% on Winston AI and 70% on GPTZero, and 0% on Originality.ai 5.0. Its quality mean was 59%.

5. Grubby

Verdict: tied with Rephrasy on bypass, with better quality. Grubby had a mean strict-bypass rate of 62.3% and a quality mean of 79.5%, with factual consistency at 76%. Its weak spot was Pangram, at 10%.

6. RewriteAI

Verdict: good on the easier detectors, close to zero on Pangram. RewriteAI passed 98% on Originality.ai Turbo but 2% on Pangram. As the API has a 300-word limit, longer texts had to be broken down into passages of up to 280 words. Its quality mean is 67.5%.

7. Phrasly

Verdict: readable output, middling bypass. Phrasly kept stance well, at 84%, with a quality mean of 75.5%. It passed 90% on Winston AI and 44% on GPTZero. It was tested on its standard model.

8. HIX Bypass

Verdict: passes the easier detectors, struggles with quality. HIX Bypass passed 100% on Winston AI and 6% on GPTZero. Its naturalness score is 6%.

9. Humbot

Verdict: similar to HIX Bypass. Humbot passed 100% on Winston AI and 76% on Originality.ai Turbo, and 0% on GPTZero. Its naturalness score is 6%.

10. BypassGPT

Verdict: clears Winston AI and ZeroGPT, little else. BypassGPT passed 100% on Winston AI, 56% on Originality.ai Turbo and 4% on GPTZero. The naturalness score was calculated to be 0%.

11. Ryne

Verdict: the best writing quality, the lowest bypass. Ryne achieved the best results for writing quality (mean 87.5%) and stance preservation (mean 94%), but a very low strict-bypass rate (mean 0.7%).

Which detector caught the most in the AI humanizer rankings

Originality.ai 5.0 best captured humanized text. Across 11 tools, 22 of 550 generated outputs managed to bypass the filters. 8 tools failed all of the generated outputs. It reports the share of a text it judges AI-written, so its human score is not comparable with Originality.ai Turbo.

Pangram was next, with 98 of 550 outputs passing. GPTZero let 257 of 550 through, Originality.ai Turbo 422 of 550, ZeroGPT 456 of 550 and Winston AI 488 of 550.

What changed since September

Results from September 2026 are not directly comparable to October. The cycles use different source samples and a different detector panel — September omitted Originality.ai 5.0, and its Pangram and GPTZero model versions differ. Both use the same 50% human-score bar. We don't compare rates across cycles on those sample, detector, and threshold grounds.

What Reddit recommends vs what our data shows

In Reddit threads we read on November 3, 2026 people most often recommended Walter Writes AI, Rephrasy, Undetectable AI and Humanize AI Pro. Most are one person's evaluation on a small number of texts, some come from tools themselves. Of the tools they name, HumanizerEval tests Undetectable.ai, ranked 2, and Rephrasy, ranked 4. Walter Writes AI and Humanize AI Pro are not in the benchmark yet. Performance varies with the texts, detectors, and settings used for each benchmark.

How the October 2026 rankings were tested

Every humanizer got the same 50 source texts, written by 5 AI models and 364 to 997 words long. Results reported are from running each detector's vendor-provided API. Exact model versions noted when available. A strict bypass is a human score above 50%, regardless of the vendor label. No composite metric (each result equally weighted). Mixed is not an automatic fail. If you are new to this, our guide on how to humanize AI text covers the manual method first.

All data is public: methodology, sources and scores.csv.

FAQ

What is the best AI humanizer right now?

In the October 2026 cycle, StealthGPT ranks first on the best ai humanizer leaderboard with a mean strict-bypass rate of 80.3%, ahead of Undetectable.ai at 71.3%.

Which AI humanizers pass Pangram?

StealthGPT passed 88% of texts on Pangram and Undetectable.ai 40%. 4 tools passed none.

Which AI humanizers pass GPTZero?

StealthGPT passed 92% on GPTZero, WriteHuman 90% and Undetectable.ai 86%. Humbot and Ryne passed none.

How were the AI humanizers tested?

Each tool got the same 50 texts (methodology), and each output was scored on 6 detectors. A strict bypass is a human score above 50%, regardless of the vendor label.