Head to head · September 2026 cycle
StealthGPT vs WriteHuman
WriteHuman finished 13.2 points ahead of StealthGPT in the September 2026 cycle, 78.29 to 65.10, ranking #1 against #9 in a field of 14. WriteHuman scored higher on 4 of 5 detectors and 7 of 7 writing categories. StealthGPT came out ahead on readability (70.9 vs 56.9) and GPTZero (77.4 vs 71.8). The bypass-rate gap, 79.6 to 90.1, sits inside both tools' 95% confidence intervals, so treat bypass as a draw.
- Detectors
- 1 – 4
- Categories
- 0 – 7
- Components
- 1 – 4
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. WriteHuman took 4 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 →
Head-to-head history
Overall score in every cycle both tools were tested. WriteHuman has finished ahead in 4 of 4 shared cycles.
| Cycle | StealthGPT | WriteHuman | Margin |
|---|---|---|---|
| September 2026 | 65.10 #9 | 78.29 #1 | → 13.2 |
| August 2026 | 45.55 #12 | 76.69 #1 | → 31.1 |
| July 2026 | 61.52 #8 | 73.07 #1 | → 11.5 |
| June 2026 | 71.47 #7 | 83.59 #2 | → 12.1 |
Where each one wins
Every measure above that one tool won outright, largest margin first within each group.
StealthGPT
2 wins- Readability Score 70.9 vs 56.9
- GPTZero Detector 77.4 vs 71.8
WriteHuman
15 wins- Penalties Score None vs −5.0
- Consistency Score 82.1 vs 63.1
- Meaning preservation Score 72.3 vs 59.4
- Bypass rate Score 90.1 vs 79.6
- Winston AI Detector 84.1 vs 66.6
- ZeroGPT Detector 77.8 vs 68.9
- Copyleaks Detector 86.7 vs 81.8
- Originality.ai Detector 91.4 vs 89.5
- Blog Post Category 83.9 vs 60.7
- Discussion Board Category 78.2 vs 60.1
- and 5 more
Questions people ask
Is StealthGPT better than WriteHuman?
WriteHuman finished 13.2 points ahead of StealthGPT in the September 2026 cycle, 78.29 to 65.10, ranking #1 against #9 in a field of 14. WriteHuman scored higher on 4 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, StealthGPT or WriteHuman?
WriteHuman posted the higher bypass rate, 90.1 vs 79.6, and scored higher on 4 of 5 detectors. StealthGPT led on GPTZero; WriteHuman led on Originality.ai, Copyleaks, Winston AI and ZeroGPT. 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, 72.3 vs 59.4 on our 0–100 similarity scale. On readability, StealthGPT rated higher, 70.9 vs 56.9. Penalties this cycle: StealthGPT −5.0, WriteHuman None.