AI Humanizer BenchmarkLeaderboard / Compare / StealthGPT vs WriteHuman
Head to head · September 2026 cycle
StealthGPT vs WriteHuman
WriteHuman finished 9.7 points ahead of StealthGPT in the September 2026 cycle, 81.60 to 71.90, ranking #3 against #7 in a field of 11. WriteHuman scored higher on 6 of 7 detectors and 6 of 7 writing categories. StealthGPT came out ahead on Readability (82.7 vs 72.4), GPTZero (78.2 vs 56.5), Business email (81.3 vs 69.5). The bypass-rate gap, 74.6 to 90.4, sits inside both tools' 95% confidence intervals, so treat bypass as a draw.
- Detectors
- 1 – 6
- Categories
- 1 – 6
- Components
- 1 – 4
- 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. WriteHuman took 6 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
3 wins- Readability Score82.7 vs 72.4
- GPTZero Detector78.2 vs 56.5
- Business email Category81.3 vs 69.5
WriteHuman
16 wins- Bypass rate Score90.4 vs 74.6
- Consistency Score86.4 vs 78.5
- Meaning preservation Score76.2 vs 70.1
- Penalties Score−1.0 vs −3.0
- QuillBot Detector92.2 vs 66.0
- ZeroGPT Detector92.0 vs 66.5
- Winston AI Detector82.1 vs 62.1
- Grammarly Detector94.2 vs 77.5
- Originality.ai Detector59.2 vs 48.2
- Copyleaks Detector63.6 vs 57.6
- Discussion board Category83.1 vs 57.2
- Application essay Category84.9 vs 66.5
- News article Category79.6 vs 68.8
- Academic essay Category86.2 vs 80.0
- Blog post Category80.6 vs 76.6
- Marketing copy Category86.2 vs 85.0
Questions people ask
Is StealthGPT better than WriteHuman?
WriteHuman finished 9.7 points ahead of StealthGPT in the September 2026 cycle, 81.60 to 71.90, ranking #3 against #7 in a field of 11. WriteHuman scored higher on 6 of 7 detectors and 6 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 WriteHuman?
WriteHuman posted the higher bypass rate, 90.4 vs 74.6, and scored higher on 6 of 7 detectors. StealthGPT led on GPTZero; WriteHuman led on Winston AI, Originality.ai, ZeroGPT, Grammarly, QuillBot and Copyleaks. The overall bypass gap is inside both 95% confidence intervals, so it is not a reliable difference.
Do StealthGPT and WriteHuman keep the original meaning?
WriteHuman preserved meaning better, 76.2 vs 70.1 on our 0–100 similarity scale. On readability, StealthGPT rated higher, 82.7 vs 72.4. Penalties this cycle: StealthGPT −3.0, WriteHuman −1.0.