AI Humanizer BenchmarkLeaderboard / Compare / CleverHumanizer vs Undetectable AI
Head to head · September 2026 cycle
CleverHumanizer vs Undetectable AI
CleverHumanizer finished 28.6 points ahead of Undetectable AI in the September 2026 cycle, 66.80 to 38.20, ranking #9 against #11 in a field of 11. CleverHumanizer scored higher on 7 of 7 detectors and 7 of 7 writing categories. Undetectable AI came out ahead on Meaning preservation (89.6 vs 65.3), Consistency (99.6 vs 88.8).
- Detectors
- 7 – 0
- Categories
- 7 – 0
- Components
- 3 – 2
- Last tested
- 2026-09-03
- Prompts
- 33
- Methodology
- v1.0.0
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
Detector by detector
Share of each tool's outputs that a detector classified as human-written. CleverHumanizer took 7 of 7.
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.
Where each one wins
Every measure above that one tool won outright, largest margin first within each group.
CleverHumanizer
17 wins- Bypass rate Score86.5 vs 0.2
- Readability Score73.2 vs 71.7
- Penalties Score−11.0 vs −12.0
- GPTZero Detector90.0 vs 6.1
- Grammarly Detector96.9 vs 18.5
- QuillBot Detector88.8 vs 16.6
- Winston AI Detector70.5 vs 0.1
- Originality.ai Detector67.0 vs 0.0
- Copyleaks Detector53.2 vs 0.0
- ZeroGPT Detector77.9 vs 26.5
- Academic essay Category81.4 vs 48.0
- News article Category82.9 vs 51.6
- Blog post Category81.5 vs 52.9
- Marketing copy Category79.1 vs 50.9
- Discussion board Category77.6 vs 50.8
- Application essay Category71.7 vs 47.8
- Business email Category68.3 vs 50.9
Undetectable AI
2 wins- Meaning preservation Score89.6 vs 65.3
- Consistency Score99.6 vs 88.8
Questions people ask
Is CleverHumanizer better than Undetectable AI?
CleverHumanizer finished 28.6 points ahead of Undetectable AI in the September 2026 cycle, 66.80 to 38.20, ranking #9 against #11 in a field of 11. CleverHumanizer scored higher on 7 of 7 detectors and 7 of 7 writing categories. Both tools ran the same 33 prompts, scored by the same 7 detectors, under methodology v1.0.0; every input, output, and verdict is published.
Which bypasses AI detectors better, CleverHumanizer or Undetectable AI?
CleverHumanizer posted the higher bypass rate, 86.5 vs 0.2, and scored higher on 7 of 7 detectors. CleverHumanizer led on GPTZero, Winston AI, Originality.ai, ZeroGPT, Grammarly, QuillBot and Copyleaks; Undetectable AI led on none. The gap holds outside both tools' 95% confidence intervals.
Do CleverHumanizer and Undetectable AI keep the original meaning?
Undetectable AI preserved meaning better, 89.6 vs 65.3 on our 0–100 similarity scale. On readability, CleverHumanizer rated higher, 73.2 vs 71.7. Penalties this cycle: CleverHumanizer −11.0, Undetectable AI −12.0.