Head to head · September 2026 cycle
Humanize AI Pro vs Undetectable.ai
Undetectable.ai finished 1.7 points ahead of Humanize AI Pro in the September 2026 cycle, 71.75 to 70.07, ranking #6 against #7 in a field of 14. Undetectable.ai scored higher on 5 of 5 detectors and 4 of 7 writing categories. Humanize AI Pro came out ahead on penalties (None vs −6.0), blog post prompts (76.0 vs 57.5) and news article prompts (66.8 vs 51.8). The bypass-rate gap, 70.8 to 82.1, sits inside both tools' 95% confidence intervals, so treat bypass as a draw.
- Detectors
- 0 – 5
- Categories
- 3 – 4
- Components
- 2 – 3
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. Undetectable.ai took 5 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 →
Head-to-head history
Overall score in every cycle both tools were tested. Undetectable.ai has finished ahead in 3 of 4 shared cycles.
| Cycle | Humanize AI Pro | Undetectable.ai | Margin |
|---|---|---|---|
| September 2026 | 70.07 #7 | 71.75 #6 | → 1.7 |
| August 2026 | 71.40 #2 | 61.49 #8 | ← 9.9 |
| July 2026 | 70.49 #3 | 72.17 #2 | → 1.7 |
| June 2026 | 68.05 #9 | 80.09 #5 | → 12.0 |
Where each one wins
Every measure above that one tool won outright, largest margin first within each group.
Humanize AI Pro
5 wins- Penalties Score None vs −6.0
- Readability Score 61.8 vs 61.7
- Blog Post Category 76.0 vs 57.5
- News Article Category 66.8 vs 51.8
- Discussion Board Category 81.2 vs 78.9
Undetectable.ai
12 wins- Bypass rate Score 82.1 vs 70.8
- Meaning preservation Score 82.1 vs 74.7
- Consistency Score 71.1 vs 65.3
- Copyleaks Detector 74.3 vs 53.5
- GPTZero Detector 72.4 vs 58.3
- Winston AI Detector 78.9 vs 70.2
- ZeroGPT Detector 80.4 vs 74.0
- Originality.ai Detector 91.7 vs 86.8
- Business Email Category 51.0 vs 37.2
- Application Essay Category 73.8 vs 60.4
- and 2 more
Questions people ask
Is Humanize AI Pro better than Undetectable.ai?
Undetectable.ai finished 1.7 points ahead of Humanize AI Pro in the September 2026 cycle, 71.75 to 70.07, ranking #6 against #7 in a field of 14. Undetectable.ai scored higher on 5 of 5 detectors and 4 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, Humanize AI Pro or Undetectable.ai?
Undetectable.ai posted the higher bypass rate, 82.1 vs 70.8, and scored higher on 5 of 5 detectors. Undetectable.ai led on GPTZero, Originality.ai, Copyleaks, Winston AI and ZeroGPT. The overall bypass gap is inside both 95% confidence intervals, so it is not a reliable difference.
Do Humanize AI Pro and Undetectable.ai keep the original meaning?
Undetectable.ai preserved meaning better, 82.1 vs 74.7 on our 0–100 similarity scale. On readability, Humanize AI Pro rated higher, 61.8 vs 61.7. Penalties this cycle: Humanize AI Pro None, Undetectable.ai −6.0.