Head to head · September 2026 cycle
AI Humanize io vs StealthBypass
AI Humanize io finished 33.6 points ahead of StealthBypass in the September 2026 cycle, 72.94 to 39.38, ranking #4 against #13 in a field of 14. AI Humanize io scored higher on 2 of 5 detectors and 7 of 7 writing categories. StealthBypass came out ahead on GPTZero (69.3 vs 55.8), consistency across categories (80.7 vs 69.2) and ZeroGPT (84.4 vs 75.0). The bypass-rate gap, 81.5 to 78.6, sits inside both tools' 95% confidence intervals, so treat bypass as a draw.
- Detectors
- 2 – 3
- Categories
- 7 – 0
- Components
- 4 – 1
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' published 95% confidence intervals for that component; it may not survive another cycle.
Detector by detector
Share of each tool's outputs that a detector classified as human-written. StealthBypass took 3 of 5.
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. How category scores work →
Where each one wins
Every measure above that one tool won outright, largest margin first within each group.
AI Humanize io
13 wins- Penalties Score −1.0 vs −23.0
- Meaning preservation Score 73.2 vs 39.5
- Readability Score 58.4 vs 54.1
- Bypass rate Score 81.5 vs 78.6
- Originality.ai Detector 93.3 vs 58.5
- Winston AI Detector 79.0 vs 56.3
- Marketing Copy Category 82.4 vs 18.9
- Blog Post Category 80.9 vs 28.2
- Application Essay Category 68.0 vs 24.5
- Academic Essay Category 80.3 vs 39.9
- and 3 more
StealthBypass
4 wins- Consistency Score 80.7 vs 69.2
- GPTZero Detector 69.3 vs 55.8
- ZeroGPT Detector 84.4 vs 75.0
- Copyleaks Detector 65.1 vs 60.6
Questions people ask
Is AI Humanize io better than StealthBypass?
AI Humanize io finished 33.6 points ahead of StealthBypass in the September 2026 cycle, 72.94 to 39.38, ranking #4 against #13 in a field of 14. AI Humanize io scored higher on 2 of 5 detectors and 7 of 7 writing categories. Both tools ran the same 33 prompts, scored by the same 5 detectors, under methodology v1.2.0; every input, output and verdict is published.
Which bypasses AI detectors better, AI Humanize io or StealthBypass?
AI Humanize io posted the higher bypass rate, 81.5 vs 78.6, and scored higher on 2 of 5 detectors. AI Humanize io led on Originality.ai and Winston AI; StealthBypass led on GPTZero, Copyleaks and ZeroGPT. The overall bypass gap is inside both 95% confidence intervals, so it is not a reliable difference.
Do AI Humanize io and StealthBypass keep the original meaning?
AI Humanize io preserved meaning better, 73.2 vs 39.5 on our 0–100 similarity scale. On readability, AI Humanize io rated higher, 58.4 vs 54.1. Penalties this cycle: AI Humanize io −1.0, StealthBypass −23.0.