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October 2026 results: WriteHuman holds #1, StealthGPT jumps to #2. Read the analysis →
HumanizerBench

Head to head · October 2026 cycle

Humanize AI Pro vs Stealth Writer

Humanize AI Pro finished 2.9 points ahead of Stealth Writer in the October 2026 cycle, 68.87 to 65.98, ranking #5 against #8 in a field of 14. Humanize AI Pro scored higher on 2 of 6 detectors and 4 of 6 writing categories. Stealth Writer came out ahead on Copyleaks (96.7 vs 70.5), ZeroGPT (90.7 vs 73.2) and Originality.ai (99.9 vs 85.7).

68.87 /100
overall score
#5 /14
rank ▲ 2
+2.89
← Humanize AI Pro leads
Detectors
2 – 4
Categories
4 – 2
Components
3 – 2
65.98 /100
overall score
#8 /14
rank ▼ 6

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 →

Bypass rate Stealth Writer by 7.9
63.4 71.3
Meaning preservation CIs overlap Humanize AI Pro by 3.4
75.0 71.6
Readability Humanize AI Pro by 20.4
62.2 41.8
Consistency Stealth Writer by 1.7
93.0 94.6
Penalties fewer is better Humanize AI Pro by 2.0
−1.0 −3.0

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. Stealth Writer took 4 of 6.

GPTZero Humanize AI Pro by 13.7
54.6 40.9
Originality.ai Stealth Writer by 14.2
85.7 99.9
Copyleaks Stealth Writer by 26.1
70.5 96.7
Winston AI Stealth Writer by 3.3
96.1 99.4
ZeroGPT Stealth Writer by 17.5
73.2 90.7
Pangram Humanize AI Pro by 0.3
0.3 0.0

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 →

Academic Essay Application Essay Blog Post Marketing Copy Discussion Board News Article Academic Essay: Humanize AI Pro 69.9 · Stealth Writer 66.8 Application Essay: Humanize AI Pro 68.3 · Stealth Writer 66.1 Blog Post: Humanize AI Pro 67.1 · Stealth Writer 68.3 Marketing Copy: Humanize AI Pro 65.1 · Stealth Writer 57.4 Discussion Board: Humanize AI Pro 68.8 · Stealth Writer 54.2 News Article: Humanize AI Pro 50.6 · Stealth Writer 55.4
Humanize AI Pro Stealth Writer Outer ring = 100
Academic Essay 6 prompts Humanize AI Pro by 3.1
69.9 66.8
Application Essay 6 prompts Humanize AI Pro by 2.2
68.3 66.1
Blog Post 6 prompts Stealth Writer by 1.2
67.1 68.3
Marketing Copy 6 prompts Humanize AI Pro by 7.7
65.1 57.4
Discussion Board 3 prompts Humanize AI Pro by 14.5
68.8 54.2
News Article 3 prompts Stealth Writer by 4.8
50.6 55.4

Head-to-head history

Overall score in every cycle both tools were tested. Humanize AI Pro has finished ahead in 3 of 5 shared cycles.

60 70 80 90 June 2026 July 2026 August 2026 September 2026 October 2026 June 2026: Stealth Writer 84.47 (#1) June 2026: Humanize AI Pro 68.05 (#9) July 2026: Stealth Writer 68.07 (#4) July 2026: Humanize AI Pro 70.49 (#3) August 2026: Stealth Writer 69.83 (#3) August 2026: Humanize AI Pro 71.40 (#2) September 2026: Stealth Writer 75.39 (#2) September 2026: Humanize AI Pro 70.07 (#7) October 2026: Stealth Writer 65.98 (#8) October 2026: Humanize AI Pro 68.87 (#5) 68.9 66.0
Humanize AI Pro Stealth Writer
Cycle Humanize AI Pro Stealth Writer Margin
October 2026 68.87 #5 65.98 #8 ← 2.9
September 2026 70.07 #7 75.39 #2 → 5.3
August 2026 71.40 #2 69.83 #3 ← 1.6
July 2026 70.49 #3 68.07 #4 ← 2.4
June 2026 68.05 #9 84.47 #1 → 16.4

Where each one wins

Every measure above that one tool won outright, largest margin first within each group.

Humanize AI Pro

9 wins
  • Readability Score 62.2 vs 41.8
  • Penalties Score −1.0 vs −3.0
  • Meaning preservation Score 75.0 vs 71.6
  • GPTZero Detector 54.6 vs 40.9
  • Pangram Detector 0.3 vs 0.0
  • Discussion Board Category 68.8 vs 54.2
  • Marketing Copy Category 65.1 vs 57.4
  • Academic Essay Category 69.9 vs 66.8
  • Application Essay Category 68.3 vs 66.1

Stealth Writer

8 wins
  • Bypass rate Score 71.3 vs 63.4
  • Consistency Score 94.6 vs 93.0
  • Copyleaks Detector 96.7 vs 70.5
  • ZeroGPT Detector 90.7 vs 73.2
  • Originality.ai Detector 99.9 vs 85.7
  • Winston AI Detector 99.4 vs 96.1
  • News Article Category 55.4 vs 50.6
  • Blog Post Category 68.3 vs 67.1

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.

Personal Statement · Application Essay · written by gemini-3-8-flash · 336 words

My fascination with Human-Computer Interaction began not in a computer lab, but while watching my grandmother struggle to use a telehealth application during a medical emergency. The technology to save her life was there, but the interface alienated her. In that moment of panic, poor contrast, ambiguous icons, and convoluted navigation transformed a lifesaving tool into an impenetrable wall. This experience cemented my conviction that the most advanced technology is entirely futile if it fails to account for human emotion, cognitive limits, and diversity.

Throughout my undergraduate studies, I sought to understand both sides of this equation—the technical constraints of software and the psychological realities of the user. In my coursework and independent projects, I found myself consistently drawn to the friction points where user intent clashed with algorithmic execution. While collaborating on a mobile application for local transit, I realized that writing efficient code was only half the battle; conducting user interviews, mapping user journeys, and redesigning the information architecture were what actually made the tool viable. Technology, I realized, should adapt to the messiness of the human experience, not force humans to adapt to the rigidity of machines.

I want to pursue a graduate degree in Human-Computer Interaction to bridge the gap between computational power and human empathy. I am particularly eager to explore how emerging paradigms—such as voice interfaces, multimodal AI, and ambient computing—can be designed to be accessible rather than exclusive. As artificial intelligence becomes deeply woven into the fabric of daily life, the need for thoughtful, ethical, and inclusive interaction design has never been more urgent.

Your program offers the ideal interdisciplinary environment for me to deepen this inquiry. By combining rigorous user research methodologies with cutting-edge technical prototyping, I hope to investigate how adaptive interfaces can empower underserved populations, including the elderly and digitally illiterate. Ultimately, I do not just want to build systems that work; I want to design intuitive, equitable experiences that make technology feel less like an obstacle and more like an effortless extension of human capability.

Show the full input

312 words (input 336)

My interest in HCI did not arise from any computer lab or classroom experience, but from observing my grandmother trying to use a telehealth app when she had an emergency. Here, all the necessary technology existed to save a person's life, but at the time when she needed it, it could not help her. Bad color contrast, confusing icons, and hard-to-use navigation turned the technology that could have saved her into something inaccessible.

During my undergraduate years, I became interested in both sides of this story – the technical limitations and capabilities of software and the user's psychological peculiarities that influence his or her interaction with the program. I noticed that no matter what I worked on during classes or my own projects, the places where the intent of the user conflicts with the execution of an algorithm interested me more than anything else. While working on a mobile app for local public transport together with other students, I came to the conclusion that the ability to write code was not the main thing; it was the interviewing of users, the creation of a user journey and redesign of information architecture that made the project alive.

I want to get a master's degree in Human-Computer Interaction because I think that technology cannot be considered effective when it is not taking into account people's emotions, cognitive abilities, and diversity. I would like to find out how such new paradigms of interaction as voice interface, multimodal AI and ambient computing may become not exclusive but accessible to everyone.

I believe that your program will provide me with the interdisciplinary academic setting I need for the purpose of my research. By learning advanced user research methods and technical prototyping, I want to explore the ways how to develop adaptive interfaces that will give an opportunity to the underrepresented communities, including older people and digital illiterates.

Show the full output
  • GPTZero0.00caught
  • Pangram0.00caught
  • Winston AI1.00passed
  • ZeroGPT1.00passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed

Passed 4 of 6 detectors.

Every Humanize AI Pro run in October 2026 →

357 words (input 336)

My motivation towards studying HCI started not in a computer lab but when I saw my grandmother experiencing difficulties with her use of a telehealth application in a medical emergency. She could have been saved, but the technology she interacted with turned her off. Poor contrast, confusing icons and screwy navigation made a lifesaving tool simply impenetrable in that moment of panic. This experience made me more certain than ever that the most sophisticated technology is useless, if it doesn't factor in human emotions, bandwidth, and diversity!

With all of these undergraduate courses I was looking to learn about the technical aspects of the software, but also how the user experiences it. I was always fascinated by the inherent conflict between user desires and algorithmic results in my coursework and in my own projects. As working on a mobile application for local transit, I discovered that although building a very efficient application was important, getting the information architecture right, mapping user journeys and interviewing users was the real key to making the tool viable. Rather than the technology forcing human beings to fit into a rigid mould, I thought to myself, “Technology should be flexible and conform to life, not the other way around”.

I'd like to go to graduate school and continue in the realm of Human-Computer Interaction, in order to connect the dots between the capabilities of computational power, and human empathy. I'm especially interested in looking at ways in which new paradigms, like voice interfaces, multimodal AI, and ambient computing can be made accessible instead of exclusive. With AI's impact on everyday life on the rise, thoughtful, ethical, inclusive interaction design is more critical than ever before.

Your program is the perfect interdisciplinary place for me to deepen this inquiry. I want to explore with rigorous user research processes and the latest in prototyping technical solutions how adaptive interfaces can be used to empower the digitally illiterate and the elderly, among other underserved populations. After all, it's not just about systems that function; it's about creating intuitive and equitable experiences where technology feels like an extension of the human capacity and becomes less intrusive.

Show the full output
  • GPTZero0.00caught
  • Pangram0.00caught
  • Winston AI1.00passed
  • ZeroGPT1.00passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed

Passed 4 of 6 detectors.

Every Stealth Writer 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 Stealth Writer?

Humanize AI Pro finished 2.9 points ahead of Stealth Writer in the October 2026 cycle, 68.87 to 65.98, ranking #5 against #8 in a field of 14. Humanize AI Pro scored higher on 2 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 Stealth Writer?

Stealth Writer posted the higher bypass rate, 71.3 vs 63.4, and scored higher on 4 of 6 detectors. Humanize AI Pro led on GPTZero and Pangram; Stealth Writer led on Originality.ai, Copyleaks, Winston AI and ZeroGPT.

Do Humanize AI Pro and Stealth Writer keep the original meaning?

Humanize AI Pro preserved meaning better, 75.0 vs 71.6 on our 0–100 similarity scale, though the confidence intervals overlap. On readability, Humanize AI Pro rated higher, 62.2 vs 41.8. Penalties this cycle: Humanize AI Pro −1.0, Stealth Writer −3.0.