AI Humanizer BenchmarkLeaderboard / Compare / ReHumanize vs Undetectable AI
Head to head · October 2026 cycle
ReHumanize vs Undetectable AI
On the October 2026 leaderboard, ReHumanize leads Undetectable AI 41.60 to 33.60, a gap of 8.00 points. ReHumanize ranks #10 and Undetectable AI ranks #11 out of 11 tools. ReHumanize scores higher on 4 of 7 detectors and in 3 of 7 writing categories. Undetectable AI is ahead on meaning preservation (72.9 vs 68.7), consistency (97.8 vs 96.9) and bypass rate (1.8% vs 1.7%). The two tools' 95% confidence intervals for bypass rate overlap, so that difference is not statistically clear.
- Detectors
- 4 – 3
- Categories
- 3 – 4
- Components
- 2 – 3
- 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
Overlapping CIs means the two tools' 95% confidence intervals for bypass rate overlap, so the bypass difference is not statistically clear.
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. ReHumanize scores higher on 4 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.
ReHumanize
9 wins- Readability Score82.7 vs 73.2
- Penalties Score−4.0 vs −12.0
- Grammarly Detector50.2 vs 20.6
- ZeroGPT Detector48.1 vs 34.5
- QuillBot Detector26.1 vs 14.5
- Copyleaks Detector4.7 vs 1.5
- Discussion board Category46.3 vs 39.0
- Academic essay Category42.1 vs 39.6
- Application essay Category46.1 vs 44.5
Undetectable AI
10 wins- Meaning preservation Score72.9 vs 68.7
- Consistency Score97.8 vs 96.9
- Bypass rate Score1.8 vs 1.7
- GPTZero Detector12.0 vs 0.0
- Originality.ai Detector3.8 vs 0.0
- Winston AI Detector3.0 vs 0.0
- Blog post Category53.0 vs 48.6
- News article Category51.7 vs 47.5
- Business email Category49.0 vs 47.9
- Marketing copy Category43.9 vs 43.1
Questions people ask
Is ReHumanize better than Undetectable AI?
On the October 2026 leaderboard, ReHumanize has an overall score of 41.60 and Undetectable AI has 33.60, a gap of 8.00 points. ReHumanize ranks #10 and Undetectable AI ranks #11 out of 11 tools. ReHumanize scores higher on 4 of 7 detectors and in 3 of 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, ReHumanize or Undetectable AI?
Undetectable AI has the higher bypass rate, 1.8% vs 1.7% for ReHumanize. Undetectable AI scores higher on GPTZero, Winston AI and Originality.ai. ReHumanize scores higher on ZeroGPT, Grammarly, QuillBot and Copyleaks. The two tools' 95% confidence intervals for bypass rate overlap, so the difference is not statistically clear.
Do ReHumanize and Undetectable AI keep the original meaning?
Meaning preservation measures how close each output stays to its input, using embedding similarity on a 0–100 scale. Undetectable AI scores 72.9 and ReHumanize scores 68.7. On readability, ReHumanize scores higher, 82.7 vs 73.2. This cycle, ReHumanize lost 4.0 points to penalties and Undetectable AI lost 12.0 points to penalties.