AI Humanizer BenchmarkLeaderboard / Compare / SmartHumanizer vs Undetectable AI
Head to head · October 2026 cycle
SmartHumanizer vs Undetectable AI
On the October 2026 leaderboard, SmartHumanizer leads Undetectable AI 80.20 to 33.60, a gap of 46.60 points. SmartHumanizer ranks #4 and Undetectable AI ranks #11 out of 11 tools. SmartHumanizer scores higher on all 7 detectors and in all 7 writing categories. Undetectable AI is ahead on consistency (97.8 vs 84.3).
- Detectors
- 7 – 0
- Categories
- 7 – 0
- Components
- 4 – 1
- 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. SmartHumanizer scores higher on all 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.
SmartHumanizer
18 wins- Bypass rate Score78.2 vs 1.8
- Penalties ScoreNone vs −12.0
- Meaning preservation Score82.9 vs 72.9
- Readability Score77.5 vs 73.2
- Originality.ai Detector82.9 vs 3.8
- Copyleaks Detector72.7 vs 1.5
- QuillBot Detector80.4 vs 14.5
- Grammarly Detector81.6 vs 20.6
- Winston AI Detector60.0 vs 3.0
- ZeroGPT Detector77.1 vs 34.5
- GPTZero Detector28.3 vs 12.0
- Discussion board Category88.6 vs 39.0
- Academic essay Category87.6 vs 39.6
- Marketing copy Category81.4 vs 43.9
- News article Category85.4 vs 51.7
- Application essay Category75.6 vs 44.5
- Business email Category74.5 vs 49.0
- Blog post Category72.2 vs 53.0
Undetectable AI
1 win- Consistency Score97.8 vs 84.3
Questions people ask
Is SmartHumanizer better than Undetectable AI?
On the October 2026 leaderboard, SmartHumanizer has an overall score of 80.20 and Undetectable AI has 33.60, a gap of 46.60 points. SmartHumanizer ranks #4 and Undetectable AI ranks #11 out of 11 tools. SmartHumanizer scores higher on all 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, SmartHumanizer or Undetectable AI?
SmartHumanizer has the higher bypass rate, 78.2% vs 1.8% for Undetectable AI. It scores higher on all 7 detectors. The two tools' 95% confidence intervals for bypass rate do not overlap.
Do SmartHumanizer 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. SmartHumanizer scores 82.9 and Undetectable AI scores 72.9. On readability, SmartHumanizer scores higher, 77.5 vs 73.2. This cycle, SmartHumanizer had no penalties and Undetectable AI lost 12.0 points to penalties.