Head to head · September 2026 cycle
Stealth Writer vs SupWriter
Stealth Writer finished 2.6 points ahead of SupWriter in the September 2026 cycle, 75.39 to 72.80, ranking #2 against #5 in a field of 14. Stealth Writer scored higher on 3 of 5 detectors and 5 of 7 writing categories. SupWriter came out ahead on news article prompts (81.1 vs 66.1), penalties (None vs −1.0) and application essay prompts (67.1 vs 62.5). The bypass-rate gap, 86.4 to 80.3, sits inside both tools' 95% confidence intervals, so treat bypass as a draw.
- Detectors
- 3 – 2
- Categories
- 5 – 2
- Components
- 3 – 2
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. Stealth Writer 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.
Stealth Writer
11 wins- Consistency Score 81.4 vs 64.7
- Bypass rate Score 86.4 vs 80.3
- Readability Score 47.2 vs 45.7
- Originality.ai Detector 97.4 vs 78.5
- GPTZero Detector 33.9 vs 21.0
- ZeroGPT Detector 81.1 vs 77.9
- Business Email Category 54.3 vs 38.7
- Discussion Board Category 84.0 vs 78.0
- Academic Essay Category 83.7 vs 79.7
- Blog Post Category 80.1 vs 78.4
- and 1 more
SupWriter
6 wins- Penalties Score None vs −1.0
- Meaning preservation Score 79.0 vs 76.3
- Copyleaks Detector 85.3 vs 81.8
- Winston AI Detector 81.5 vs 80.3
- News Article Category 81.1 vs 66.1
- Application Essay Category 67.1 vs 62.5
Questions people ask
Is Stealth Writer better than SupWriter?
Stealth Writer finished 2.6 points ahead of SupWriter in the September 2026 cycle, 75.39 to 72.80, ranking #2 against #5 in a field of 14. Stealth Writer scored higher on 3 of 5 detectors and 5 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, Stealth Writer or SupWriter?
Stealth Writer posted the higher bypass rate, 86.4 vs 80.3, and scored higher on 3 of 5 detectors. Stealth Writer led on GPTZero, Originality.ai and ZeroGPT; SupWriter led on Copyleaks and Winston AI. The overall bypass gap is inside both 95% confidence intervals, so it is not a reliable difference.
Do Stealth Writer and SupWriter keep the original meaning?
SupWriter preserved meaning better, 79.0 vs 76.3 on our 0–100 similarity scale, though the confidence intervals overlap. On readability, Stealth Writer rated higher, 47.2 vs 45.7. Penalties this cycle: Stealth Writer −1.0, SupWriter None.