AI Humanizer BenchmarkLeaderboard / Compare / AI Humanize vs StealthGPT
Head to head · October 2026 cycle
AI Humanize vs StealthGPT
On the October 2026 leaderboard, AI Humanize leads StealthGPT 78.33 to 64.52, a gap of 13.81 points. AI Humanize ranks #5 and StealthGPT ranks #9 out of 11 tools. AI Humanize scores higher on 6 of 7 detectors and in all 7 writing categories. StealthGPT is ahead on readability (80.6 vs 72.1), meaning preservation (67.7 vs 66.4) and GPTZero (41.5 vs 40.9).
- Detectors
- 6 – 1
- Categories
- 7 – 0
- Components
- 3 – 2
- Last tested
- Prompts
- 33
- Methodology
- v1.1.0
Score components
The overall score weights bypass rate at 42%, meaning preservation at 32%, readability at 16% and consistency across writing categories at 10%. Penalties for output-quality failures are then subtracted. Full scoring formula
Detector by detector
Each figure is one detector's average human-likelihood score across all of a tool's outputs, on a 0–100 scale. Higher means more human. AI Humanize scores higher on 6 of 7 detectors.
Writing categories
Each category score applies the overall-score weights to that category's prompts only. Bypass, meaning preservation and readability are averaged within the category, and the tool's overall consistency score is added. Penalties are not subtracted. Categories with few prompts give less reliable scores, so each row shows its prompt count.
Where each one wins
Measures where one tool is ahead of the other. Ties are left out. Score components come first, then detectors, then categories, with the largest gap first in each group.
AI Humanize
16 wins- Bypass rate Score89.5 vs 62.8
- Consistency Score89.3 vs 75.9
- Penalties Score−1.0 vs −4.0
- Winston AI Detector86.5 vs 55.3
- QuillBot Detector88.0 vs 61.3
- Originality.ai Detector85.5 vs 62.7
- Grammarly Detector91.1 vs 69.0
- ZeroGPT Detector85.7 vs 67.4
- Copyleaks Detector72.7 vs 60.6
- Application essay Category73.5 vs 51.2
- Business email Category77.2 vs 59.5
- Discussion board Category83.1 vs 69.6
- News article Category81.6 vs 70.8
- Blog post Category78.5 vs 70.1
- Academic essay Category84.2 vs 78.3
- Marketing copy Category79.2 vs 77.3
StealthGPT
3 wins- Readability Score80.6 vs 72.1
- Meaning preservation Score67.7 vs 66.4
- GPTZero Detector41.5 vs 40.9
Questions people ask
Is AI Humanize better than StealthGPT?
On the October 2026 leaderboard, AI Humanize has an overall score of 78.33 and StealthGPT has 64.52, a gap of 13.81 points. AI Humanize ranks #5 and StealthGPT ranks #9 out of 11 tools. AI Humanize scores higher on 6 of 7 detectors and in all 7 writing categories. Both tools rewrote the same 33 prompts, the same 7 detectors checked every output, and scoring followed methodology v1.1.0. All inputs, outputs and detector verdicts are public.
Which bypasses AI detectors better, AI Humanize or StealthGPT?
AI Humanize has the higher bypass rate, 89.5% vs 62.8% for StealthGPT. AI Humanize scores higher on Winston AI, Originality.ai, ZeroGPT, Grammarly, QuillBot and Copyleaks. StealthGPT scores higher on GPTZero. The two tools' 95% confidence intervals for bypass rate do not overlap.
Do AI Humanize and StealthGPT keep the original meaning?
Meaning preservation measures how close each output stays to its input, using embedding similarity on a 0–100 scale. StealthGPT scores 67.7 and AI Humanize scores 66.4. On readability, StealthGPT scores higher, 80.6 vs 72.1. This cycle, AI Humanize lost 1.0 points to penalties and StealthGPT lost 4.0 points to penalties.