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

Head to head · October 2026 cycle

HIX Bypass vs Undetectable.ai

Undetectable.ai finished 6.0 points ahead of HIX Bypass in the October 2026 cycle, 71.18 to 65.14, ranking #3 against #9 in a field of 14. Undetectable.ai scored higher on 6 of 6 detectors and 4 of 6 writing categories. HIX Bypass came out ahead on penalties (None vs −5.0), news article prompts (67.4 vs 61.4) and blog post prompts (62.9 vs 58.1).

65.14 /100
overall score
#9 /14
rank ▼ 6
+6.04
Undetectable.ai leads →
Detectors
0 – 6
Categories
2 – 4
Components
1 – 4
71.18 /100
overall score
#3 /14
rank ▲ 3

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 Undetectable.ai by 17.8
56.8 74.6
Meaning preservation CIs overlap Undetectable.ai by 0.3
78.9 79.2
Readability Undetectable.ai by 21.8
42.2 63.9
Consistency Undetectable.ai by 0.2
92.8 93.0
Penalties fewer is better HIX Bypass by 5.0
None −5.0

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. Undetectable.ai took 6 of 6.

GPTZero Undetectable.ai by 73.6
11.4 85.0
Originality.ai Undetectable.ai by 11.2
77.5 88.7
Copyleaks Undetectable.ai by 6.2
81.7 87.9
Winston AI Undetectable.ai by 3.5
94.9 98.5
ZeroGPT Undetectable.ai by 8.4
75.4 83.8
Pangram Undetectable.ai by 3.5
0.0 3.5

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 →

Academic Essay Application Essay Blog Post Marketing Copy Discussion Board News Article Academic Essay: HIX Bypass 62.4 · Undetectable.ai 69.0 Application Essay: HIX Bypass 61.2 · Undetectable.ai 76.4 Blog Post: HIX Bypass 62.9 · Undetectable.ai 58.1 Marketing Copy: HIX Bypass 60.7 · Undetectable.ai 71.5 Discussion Board: HIX Bypass 58.9 · Undetectable.ai 69.4 News Article: HIX Bypass 67.4 · Undetectable.ai 61.4
HIX Bypass Undetectable.ai Outer ring = 100
Academic Essay 6 prompts Undetectable.ai by 6.6
62.4 69.0
Application Essay 6 prompts Undetectable.ai by 15.2
61.2 76.4
Blog Post 6 prompts HIX Bypass by 4.8
62.9 58.1
Marketing Copy 6 prompts Undetectable.ai by 10.7
60.7 71.5
Discussion Board 3 prompts Undetectable.ai by 10.4
58.9 69.4
News Article 3 prompts HIX Bypass by 6.0
67.4 61.4

Head-to-head history

Overall score in every cycle both tools were tested. HIX Bypass has finished ahead in 3 of 5 shared cycles.

50 60 70 80 90 June 2026 July 2026 August 2026 September 2026 October 2026 June 2026: Undetectable.ai 80.09 (#5) June 2026: HIX Bypass 83.52 (#3) July 2026: Undetectable.ai 72.17 (#2) July 2026: HIX Bypass 64.84 (#6) August 2026: Undetectable.ai 61.49 (#8) August 2026: HIX Bypass 67.93 (#4) September 2026: Undetectable.ai 71.75 (#6) September 2026: HIX Bypass 73.97 (#3) October 2026: Undetectable.ai 71.18 (#3) October 2026: HIX Bypass 65.14 (#9) 65.1 71.2
HIX Bypass Undetectable.ai
Cycle HIX Bypass Undetectable.ai Margin
October 2026 65.14 #9 71.18 #3 → 6.0
September 2026 73.97 #3 71.75 #6 ← 2.2
August 2026 67.93 #4 61.49 #8 ← 6.4
July 2026 64.84 #6 72.17 #2 → 7.3
June 2026 83.52 #3 80.09 #5 ← 3.4

Where each one wins

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

HIX Bypass

3 wins
  • Penalties Score None vs −5.0
  • News Article Category 67.4 vs 61.4
  • Blog Post Category 62.9 vs 58.1

Undetectable.ai

14 wins
  • Readability Score 63.9 vs 42.2
  • Bypass rate Score 74.6 vs 56.8
  • Meaning preservation Score 79.2 vs 78.9
  • Consistency Score 93.0 vs 92.8
  • GPTZero Detector 85.0 vs 11.4
  • Originality.ai Detector 88.7 vs 77.5
  • ZeroGPT Detector 83.8 vs 75.4
  • Copyleaks Detector 87.9 vs 81.7
  • Pangram Detector 3.5 vs 0.0
  • Winston AI Detector 98.5 vs 94.9
  • and 4 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.

Cover Letter · Application Essay · written by claude-sonnet-5-5 · 414 words

Dear Hiring Team,

I'm writing to apply for the freelance documentary editor position. With eight years of experience shaping nonfiction stories for broadcast, streaming, and festival audiences, I bring both technical precision and a strong narrative instinct to every project I touch.

My career began as an assistant editor on a feature-length documentary about coastal communities facing displacement. Working alongside the director, I logged more than 200 hours of footage and helped build the assembly cut that ultimately secured additional funding. That experience taught me what I still believe today: great documentary editing is about finding the story that already exists in the material, then having the discipline to let it breathe.

Since then, I've edited projects ranging from 8-minute web shorts to a 90-minute feature that premiered at a regional film festival. I'm fluent in Adobe Premiere Pro and DaVinci Resolve, and I'm comfortable with Avid Media Composer when a project demands it. I also handle my own basic color correction, audio cleanup, and motion graphics, which helps keep budgets lean and timelines tight. For archival-heavy projects, I'm experienced in organizing large media libraries, tracking licensing requirements, and working with mixed formats and frame rates without compromising quality.

What I value most in this work is collaboration. I've learned that every director has a different relationship with their footage, and my job is to listen closely before I make a single cut. I provide clear, organized review cuts, welcome candid feedback, and communicate proactively when I see structural problems or opportunities. Producers have told me they appreciate that I meet deadlines and flag issues early rather than late.

Recently, I edited a short documentary profiling a third-generation bakery owner for a nonprofit client. The raw interviews were scattered and emotionally uneven. By restructuring the film around a single morning of work, I created a quiet, intimate piece that was later selected for two festivals and drove a measurable increase in the client's donations.

As a freelancer, I'm accustomed to working remotely and adapting quickly to new teams, workflows, and creative visions. I maintain a reliable editing setup with secure backup systems, and I'm happy to work within your preferred file-sharing and review platforms.

I would welcome the chance to discuss how my skills could support your upcoming projects. My portfolio and reel are available at the link below, and I'm happy to provide references upon request. Thank you for your time and consideration.

Sincerely, [Your Name] [Phone Number] | [Email Address] [Portfolio Link]

Show the full input

456 words (input 414)

Dear Hiring Team,

I am applying for the position of freelance documentary editor. After eight years honing my skill as a nonfiction story editor for broadcast, streaming and festival audiences alike, I inject both technical precision and instinctive narrative intuition into any project I'm attached to.

My work story starts off working as an assistant editor on a feature length documentary about coastal communities at risk of being displaced. I pitched in and helped the Director log more than 200 hours of footage which we built an assembly cut to get additional financing to finish the film. That experience gave me a lesson I still believe today; making a good documentary is not about fabrication, it is about finding the story that already lives in the material and giving it space.

Since then, I have edited everything from 8-minute shorts for the web to a 90-minute feature that screened at a local film festival. I am an expert at Adobe Premiere Pro and DaVinci Resolve, while very familiar with Avid Media Composer if the project calls for it. I also do my own basic color correction, audio cleanup and motion graphics to help keep those budgets trim and timelines lean. With projects that are heavy on archival footage, I'm adept at managing large media libraries and documenting license requirements, and can work in mixed formats and frame rates without affecting quality.

Collaboration : I think what I value the most about this work Learning that every director has a relationship with their footage, and it is my role to not touch the media until the closest listening. I have conventionally unambiguous organized review cuts, invite frank comments and speak proactively if I see structural issues or chances. The producers have said they like that I hit the deadlines and bring up issues early rather than late.

For a nonprofit client, I recently edited a short documentary on a third-generation bakery owner. The unedited interviews were disorganized and haphazardly emotional. Re-framing the movie as a single morning of work, I produced an unassuming, sensitive film that was accepted into two festivals and resulted in a measurable increase in donations to the client.

I have been a freelancer for many years, which means I am used to working remotely and merging quickly into new teams, workflows and creative visions. I have a solid editing workflow in place with secure backups, and can accommodate file-sharing and review tools of your choice.

I look forward to the opportunity of speaking with you about how my skill may assist in your future endeavours. You can find my portfolio and reel here (references available upon request): I appreciate your time and consideration!

Sincerely,

[Your Name]

[Phone Number] | [Email Address]

[Portfolio Link]

Show the full output
  • GPTZero0.00caught
  • Pangram0.00caught
  • Winston AI0.97passed
  • ZeroGPT0.92passed
  • Copyleaks0.00caught
  • Originality.ai1.00passed

Passed 3 of 6 detectors.

Every HIX Bypass run in October 2026 →

509 words (input 414)

Dear Hiring Team,

I am writing because I would like to apply for the Freelance Documentary Editor position listed. I have 8 years of experience working with Nonfiction as an assistant editor for feature length documentaries, and as a freelance editor of shorter documentary forms that air on television, stream online, and play at film festivals.

My first experience in documentary film was as an Assistant Editor to a feature length documentary, ‘Coast’, a film about people whose lives are being affected by coastal erosion and the displacement of communities by development. I spent over 200 hours logging all of the footage for the film’s director, which formed the basis of the assembly edit that we used to secure further funding for the film.

The projects that I have worked on vary greatly from a short 8 minute web documentary, to a 90-minute feature length film that premiered at a regional film festival. I have worked in Adobe Premiere Pro and DaVinci Resolve, and have a good working knowledge of Avid Media Composer where a project calls for it. I am also happy to do basic color correction, audio clean up, and motion graphics in order to keep costs low and meet a tight deadline. Archive-heavy documentaries require large media management, as well as organizing of archival materials, and I have strong knowledge of film licensing, and frame rates, shot in mixed formats.

My best quality as an editor is my ability to work collaboratively with Directors. Each Director has a very different relationship with their footage and I strive to make sure that I am working in the best manner possible for each individual. I make sure that my review versions are clear and organized. I welcome all feedback, whether it be positive or negative, and am always in touch regarding structural problems or opportunities in the narrative of a film. I have received feedback from Producers that I always meet my deadlines and point out potential problems before they become huge issues.

A recent short I completed, ‘The Baker’ documenting the life of a third generation bakery owner for a Non Profit Client was a really rewarding edit to work on. The raw material was scattered and emotional in parts, however re-structuring the documentary to follow the owner of the bakery through his single busiest morning of trade created an intimate and quiet film that gained entries into two festivals and raised significant donations for the Non Profit Client on release.

As a freelancer, I work remotely and can easily and adaptively incorporate into a new team. I have an effective, current editing suite complete with secure back-ups and can work off of any file-sharing/reviewing platform of choice.

I’d look forward to speaking with you about whether or not my experience would be a good fit for your future projects. I have included a link to my portfolio and reel below, and would be happy to provide references as well. Thanks again for your time and consideration.

Sincerely, [Your Name] [Phone Number] | [Email Address] [Portfolio Link]

Show the full output
  • GPTZero0.95passed
  • Pangram0.00caught
  • Winston AI1.00passed
  • ZeroGPT0.97passed
  • 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 HIX Bypass better than Undetectable.ai?

Undetectable.ai finished 6.0 points ahead of HIX Bypass in the October 2026 cycle, 71.18 to 65.14, ranking #3 against #9 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, HIX Bypass or Undetectable.ai?

Undetectable.ai posted the higher bypass rate, 74.6 vs 56.8, and scored higher on 6 of 6 detectors. Undetectable.ai led on GPTZero, Originality.ai, Copyleaks, Winston AI, ZeroGPT and Pangram.

Do HIX Bypass and Undetectable.ai keep the original meaning?

Undetectable.ai preserved meaning better, 79.2 vs 78.9 on our 0–100 similarity scale, though the confidence intervals overlap. On readability, Undetectable.ai rated higher, 63.9 vs 42.2. Penalties this cycle: HIX Bypass None, Undetectable.ai −5.0.