Head to head · October 2026 cycle
Humanize AI Pro vs Undetectable.ai
Undetectable.ai finished 2.3 points ahead of Humanize AI Pro in the October 2026 cycle, 71.18 to 68.87, ranking #3 against #5 in a field of 14. Undetectable.ai scored higher on 6 of 6 detectors and 4 of 6 writing categories. Humanize AI Pro came out ahead on penalties (−1.0 vs −5.0), blog post prompts (67.1 vs 58.1) and academic essay prompts (69.9 vs 69.0).
- Detectors
- 0 – 6
- Categories
- 2 – 4
- Components
- 1 – 3 (1 tie)
30 prompts · Last tested · Methodology v1.3.0
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 →
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 6 of 6.
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 4 of 5 shared cycles.
| Cycle | Humanize AI Pro | Undetectable.ai | Margin |
|---|---|---|---|
| October 2026 | 68.87 #5 | 71.18 #3 | → 2.3 |
| 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
3 wins- Penalties Score −1.0 vs −5.0
- Blog Post Category 67.1 vs 58.1
- Academic Essay Category 69.9 vs 69.0
Undetectable.ai
13 wins- Bypass rate Score 74.6 vs 63.4
- Meaning preservation Score 79.2 vs 75.0
- Readability Score 63.9 vs 62.2
- GPTZero Detector 85.0 vs 54.6
- Copyleaks Detector 87.9 vs 70.5
- ZeroGPT Detector 83.8 vs 73.2
- Pangram Detector 3.5 vs 0.3
- Originality.ai Detector 88.7 vs 85.7
- Winston AI Detector 98.5 vs 96.1
- News Article Category 61.4 vs 50.6
- and 3 more
Same prompt, both outputs
Both tools were given this AI-written passage in the October 2026 cycle. Below it is what each one returned. This prompt was picked by a fixed rule, not by how the tools scored.
AI-written input
Every tool on this prompt →Product Desc · Marketing Copy · written by gpt-6-sol · 200 words
Bring precision to every line with a ruler built for careful measuring and marking. Precision-milled from stainless steel, it offers a straight, dependable edge for layout work, drafting, and workshop tasks. Its metal construction gives it a reassuring feel in hand and makes it a practical choice for a tool you will reach for again and again.
Use the ruler to mark a cut line, check a dimension, guide a pencil, or keep a drawing aligned. The slim profile sits close to the surface, helping you place it where you need it and see the work beneath your hand. On a desk, at a workbench, or in a project kit, it is a simple tool with a clear purpose: helping you work with care.
Made for makers, designers, students, and anyone who values a clean line, this ruler fits naturally into everyday routines. It pairs well with a sharp pencil, a marking knife, or your favorite notebook. Whether you are planning a detailed project or making a quick measurement, its precise edge helps you move from an idea to the next step with confidence. Keep it nearby for the small checks and straight lines that make a difference over time.
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189 words (input 200)
Achieve precision on every single line using a ruler designed for accurate measurements and markings. The ruler is made of stainless steel and milled precisely for maximum precision in drawing, layouting and other shop work. Being made of metal, this ruler provides you with the reliable tool which is comfortable to use.
It can be used to mark cutting lines, measure the dimensions, guide a pencil and align drawings. Thin and handy, the ruler stays very close to the working surface and thus it is convenient to place it where you want and control what happens underneath your hand. Be it a drawing table, workshop workbench or your projects case, this ruler is very handy tool which is designed to be used frequently and repeatedly.
Made specially for craftsmen, designers, students and everyone who pays attention to the quality of his drawings and layouts, this ruler becomes the natural element of daily routine. It fits perfectly together with sharp pencil, marker knife and any notebook. No matter whether you are working out some project or just taking quick measurement, you will find this ruler useful for the next step.
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- GPTZero0.00caught
- Pangram0.00caught
- Winston AI0.99passed
- ZeroGPT1.00passed
- Copyleaks1.00passed
- Originality.ai1.00passed
Passed 4 of 6 detectors.
Every Humanize AI Pro run in October 2026 →172 words (input 200)
Elevate your line work with a precision ruler. Carefully milled from stainless steel for extreme accuracy and durability, our ruler is perfect for tasks that demand precise layout, detailed drafting or sharp workshop work. And with a quality metal ruler in hand, you can’t help but feel confident in your work.
Use the ruler to mark a line for cutting, to check a dimension, to guide a pencil, or to keep drawings aligned. The slim line of the ruler ensures that it sits flat against the surface that you are working on. The ruler is a very useful tool for any number of tasks and sits very neatly on a desk, workbench or in a project kit.
Ideal for makers, designers, students and anyone who likes a clean line this precision ruler will sit nicely next to your pens, sharpener, marking knife or any other tool that you use to draw lines and make marks in your notebook, on your workbench or wherever you work. A useful addition to your daily routine.
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- GPTZero0.60passed
- Pangram0.00caught
- Winston AI1.00passed
- ZeroGPT0.66passed
- Copyleaks1.00passed
- Originality.ai1.00passed
Passed 5 of 6 detectors.
Every Undetectable.ai run in October 2026 →Each chip is one detector's score for that output, from 0 (AI) to 1 (human). A score of 0.50 or higher counts as a pass and shows green; below that the detector caught it and the chip shows red.
Questions people ask
Is Humanize AI Pro better than Undetectable.ai?
Undetectable.ai finished 2.3 points ahead of Humanize AI Pro in the October 2026 cycle, 71.18 to 68.87, ranking #3 against #5 in a field of 14. Undetectable.ai scored higher on 6 of 6 detectors and 4 of 6 writing categories. Both tools ran the same 30 prompts, scored by the same 6 detectors, under methodology v1.3.0; 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, 74.6 vs 63.4, and scored higher on 6 of 6 detectors. Undetectable.ai led on GPTZero, Originality.ai, Copyleaks, Winston AI, ZeroGPT and Pangram.
Do Humanize AI Pro and Undetectable.ai keep the original meaning?
Undetectable.ai preserved meaning better, 79.2 vs 75.0 on our 0–100 similarity scale, though the confidence intervals overlap. On readability, Undetectable.ai rated higher, 63.9 vs 62.2. Penalties this cycle: Humanize AI Pro −1.0, Undetectable.ai −5.0.