AI Humanizer BenchmarkLeaderboard / Compare / AI Humanize vs StealthGPT
Head to head · September 2026 cycle
AI Humanize vs StealthGPT
AI Humanize finished 4.2 points ahead of StealthGPT in the September 2026 cycle, 76.10 to 71.90, ranking #5 against #7 in a field of 11. AI Humanize scored higher on 5 of 7 detectors and 5 of 7 writing categories. StealthGPT came out ahead on Consistency (78.5 vs 67.9), Readability (82.7 vs 74.7), Originality.ai (48.2 vs 23.2). The bypass-rate gap, 74.6 to 82.6, sits inside both tools' 95% confidence intervals, so treat bypass as a draw.
- Detectors
- 5 – 2
- Categories
- 5 – 2
- Components
- 3 – 2
- Last tested
- 2026-09-03
- Prompts
- 33
- Methodology
- v1.0.0
Score components
What the overall score is made of: bypass rate weighs 42%, meaning preservation 32%, readability 16%, consistency across categories 10%. Output-quality penalties come off the total. How scoring works
CIs overlap marks a gap that sits inside both tools' 95% confidence intervals for bypass rate; it may not survive another cycle.
Detector by detector
Share of each tool's outputs that a detector classified as human-written. AI Humanize took 5 of 7.
Writing categories
Category score per writing context: bypass credit only for real rewrites, blended with the category's own meaning preservation and readability. Small categories swing; the prompt count is shown on each row.
Where each one wins
Every measure above that one tool won outright, largest margin first within each group.
AI Humanize
13 wins- Bypass rate Score82.6 vs 74.6
- Penalties ScoreNone vs −3.0
- Meaning preservation Score70.8 vs 70.1
- QuillBot Detector89.3 vs 66.0
- ZeroGPT Detector87.1 vs 66.5
- Winston AI Detector81.0 vs 62.1
- Grammarly Detector88.4 vs 77.5
- Copyleaks Detector66.7 vs 57.6
- Discussion board Category73.0 vs 57.2
- News article Category82.2 vs 68.8
- Application essay Category74.7 vs 66.5
- Blog post Category79.7 vs 76.6
- Academic essay Category83.1 vs 80.0
StealthGPT
6 wins- Consistency Score78.5 vs 67.9
- Readability Score82.7 vs 74.7
- Originality.ai Detector48.2 vs 23.2
- GPTZero Detector78.2 vs 55.4
- Business email Category81.3 vs 41.5
- Marketing copy Category85.0 vs 82.7
Questions people ask
Is AI Humanize better than StealthGPT?
AI Humanize finished 4.2 points ahead of StealthGPT in the September 2026 cycle, 76.10 to 71.90, ranking #5 against #7 in a field of 11. AI Humanize scored higher on 5 of 7 detectors and 5 of 7 writing categories. Both tools ran the same 33 prompts, scored by the same 7 detectors, under methodology v1.0.0; every input, output, and verdict is published.
Which bypasses AI detectors better, AI Humanize or StealthGPT?
AI Humanize posted the higher bypass rate, 82.6 vs 74.6, and scored higher on 5 of 7 detectors. AI Humanize led on Winston AI, ZeroGPT, Grammarly, QuillBot and Copyleaks; StealthGPT led on GPTZero and Originality.ai. The overall bypass gap is inside both 95% confidence intervals, so it is not a reliable difference.
Do AI Humanize and StealthGPT keep the original meaning?
AI Humanize preserved meaning better, 70.8 vs 70.1 on our 0–100 similarity scale. On readability, StealthGPT rated higher, 82.7 vs 74.7. Penalties this cycle: AI Humanize None, StealthGPT −3.0.