HumanizerEval, October 2026 review
Best AI humanizers of October 2026
HumanizerEval's October 2026 review ran 11 AI humanizers on the same 50 texts and checked every output with 6 AI detectors. The tools below are ranked by mean bypass rate: the average share of texts that passed each detector.
Disclosure: HumanizerEval is built by the StealthGPT team, and StealthGPT is one of the humanizers it ranks. Its per-sample scores are public, so you can check the results yourself at humanizereval.com.
October 2026 rankings
| Humanizer | Mean bypass | Pangram | GPTZero | Originality.ai Turbo | Originality.ai 5.0 | ZeroGPT | Winston AI |
|---|---|---|---|---|---|---|---|
| 1StealthGPT Super | Mean bypass80.3% | Pangram88% | GPTZero92% | Originality.ai Turbo92% | Originality.ai 5.034% | ZeroGPT84% | Winston AI92% |
| 2Undetectable.ai | Mean bypass71.3% | Pangram40% | GPTZero86% | Originality.ai Turbo98% | Originality.ai 5.04% | ZeroGPT100% | Winston AI100% |
| 3WriteHuman | Mean bypass69.7% | Pangram26% | GPTZero90% | Originality.ai Turbo100% | Originality.ai 5.06% | ZeroGPT96% | Winston AI100% |
| 4Rephrasy | Mean bypass62.3% | Pangram26% | GPTZero70% | Originality.ai Turbo86% | Originality.ai 5.00% | ZeroGPT92% | Winston AI100% |
| 5Grubby | Mean bypass62.3% | Pangram10% | GPTZero68% | Originality.ai Turbo100% | Originality.ai 5.00% | ZeroGPT96% | Winston AI100% |
| 6RewriteAI | Mean bypass56.3% | Pangram2% | GPTZero54% | Originality.ai Turbo98% | Originality.ai 5.00% | ZeroGPT90% | Winston AI94% |
| 7Phrasly | Mean bypass48.7% | Pangram4% | GPTZero44% | Originality.ai Turbo72% | Originality.ai 5.00% | ZeroGPT82% | Winston AI90% |
| 8HIX Bypass | Mean bypass44.0% | Pangram0% | GPTZero6% | Originality.ai Turbo66% | Originality.ai 5.00% | ZeroGPT92% | Winston AI100% |
| 9Humbot | Mean bypass44.0% | Pangram0% | GPTZero0% | Originality.ai Turbo76% | Originality.ai 5.00% | ZeroGPT88% | Winston AI100% |
| 10BypassGPT | Mean bypass41.3% | Pangram0% | GPTZero4% | Originality.ai Turbo56% | Originality.ai 5.00% | ZeroGPT88% | Winston AI100% |
| 11Ryne | Mean bypass0.7% | Pangram0% | GPTZero0% | Originality.ai Turbo0% | Originality.ai 5.00% | ZeroGPT4% | Winston AI0% |
Each detector column is the share of 50 texts that the detector gave a human score above 50%. The best rate on each detector is in bold. With 50 texts per tool, gaps of a few points are within the margin of error. How the test works
Where StealthGPT trails
StealthGPT Super ranked #1 on the mean, but it doesn't lead on every detector:
- Originality.ai Turbo: 4 tools scored higher, up to 100%, against 92% for StealthGPT.
- ZeroGPT: 8 tools scored higher, up to 100%, against 84% for StealthGPT.
- Winston AI: 8 tools scored higher, up to 100%, against 92% for StealthGPT.
It passed all 6 detectors on 17 of 50 texts. Its lowest rate was on Originality.ai 5.0, which 33 of its 50 texts did not pass.
Detectors disagree
On the same texts, the average tool passed Winston AI 89% of the time and Originality.ai 5.0 4% of the time, so a tool's rate on one detector can be far from its mean.
See which detectors were hardest to pass