AI Humanizer BenchmarkLeaderboard / Compare / StealthGPT vs SuperHumanizer
Head to head · September 2026 cycle
StealthGPT vs SuperHumanizer
StealthGPT finished 3.4 points ahead of SuperHumanizer in the September 2026 cycle, 71.90 to 68.50, ranking #7 against #8 in a field of 11. StealthGPT scored higher on 4 of 7 detectors and 4 of 7 writing categories. SuperHumanizer came out ahead on Meaning preservation (77.3 vs 70.1), ZeroGPT (78.7 vs 66.5), QuillBot (74.6 vs 66.0). The bypass-rate gap, 70.7 to 74.6, sits inside both tools' 95% confidence intervals, so treat bypass as a draw.
- Detectors
- 4 – 3
- Categories
- 4 – 3
- Components
- 4 – 1
- 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. StealthGPT took 4 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.
StealthGPT
12 wins- Readability Score82.7 vs 74.0
- Consistency Score78.5 vs 72.8
- Bypass rate Score74.6 vs 70.7
- Penalties Score−3.0 vs −5.0
- GPTZero Detector78.2 vs 64.0
- Winston AI Detector62.1 vs 52.3
- Copyleaks Detector57.6 vs 51.4
- Grammarly Detector77.5 vs 76.8
- Business email Category81.3 vs 57.1
- Blog post Category76.6 vs 68.1
- Marketing copy Category85.0 vs 77.6
- Application essay Category66.5 vs 64.5
SuperHumanizer
7 wins- Meaning preservation Score77.3 vs 70.1
- ZeroGPT Detector78.7 vs 66.5
- QuillBot Detector74.6 vs 66.0
- Originality.ai Detector50.8 vs 48.2
- Discussion board Category81.3 vs 57.2
- News article Category85.5 vs 68.8
- Academic essay Category82.4 vs 80.0
Questions people ask
Is StealthGPT better than SuperHumanizer?
StealthGPT finished 3.4 points ahead of SuperHumanizer in the September 2026 cycle, 71.90 to 68.50, ranking #7 against #8 in a field of 11. StealthGPT scored higher on 4 of 7 detectors and 4 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, StealthGPT or SuperHumanizer?
StealthGPT posted the higher bypass rate, 74.6 vs 70.7, and scored higher on 4 of 7 detectors. StealthGPT led on GPTZero, Winston AI, Grammarly and Copyleaks; SuperHumanizer led on Originality.ai, ZeroGPT and QuillBot. The overall bypass gap is inside both 95% confidence intervals, so it is not a reliable difference.
Do StealthGPT and SuperHumanizer keep the original meaning?
SuperHumanizer preserved meaning better, 77.3 vs 70.1 on our 0–100 similarity scale. On readability, StealthGPT rated higher, 82.7 vs 74.0. Penalties this cycle: StealthGPT −3.0, SuperHumanizer −5.0.