StealthBypass
StealthBypass is an AI humanizer independently benchmarked by HumanizerBench. It ranked #13 of 14 in the September 2026 cycle with an overall score of 39.38/100, our composite measure of how reliably it evades AI detectors while preserving the original meaning and readability.
Detector Bypass Rates
Percentage of runs classified as human-written by each detector.
Performance by Category
Category score across writing contexts: bypass credit only for real rewrites, blended with each category's meaning and readability. How it's computed
12-Month Trend
Overall score across the past year of testing cycles.
Session recordings
See the full methodology →Screen captures from the benchmark runs, kept for auditability. Hosted links may expire over time; the JSON in this repo is the source of truth.
Test markers
- 0:34stealthbypass · application_essay · cover_letter
- 0:56stealthbypass · application_essay · cover_letter
- 1:16stealthbypass · application_essay · personal_statement
- 1:38stealthbypass · blog_post · howto_blog
- 2:07stealthbypass · application_essay · cover_letter
- 2:26stealthbypass · application_essay · personal_statement
- 2:45stealthbypass · blog_post · listicle_blog
- 3:19stealthbypass · application_essay · personal_statement
- 3:39stealthbypass · discussion_board · discussion_post
- 4:11stealthbypass · academic_essay · lit_review
- 4:32stealthbypass · academic_essay · lit_review
- 4:51stealthbypass · marketing_copy · landing_copy
- 5:16stealthbypass · academic_essay · lit_review
- 5:35stealthbypass · blog_post · howto_blog
- 5:52stealthbypass · academic_essay · argumentative_essay
- 6:11stealthbypass · business_email · business_email
- 6:32stealthbypass · marketing_copy · product_desc
- 6:55stealthbypass · academic_essay · argumentative_essay
- 7:21stealthbypass · marketing_copy · landing_copy
- 7:39stealthbypass · business_email · business_email
- 8:04stealthbypass · news_article · news_article
- 8:24stealthbypass · blog_post · listicle_blog
- 8:40stealthbypass · academic_essay · argumentative_essay
- 9:01stealthbypass · blog_post · howto_blog
- 9:19stealthbypass · news_article · news_article
- 9:42stealthbypass · discussion_board · discussion_post
- 9:58stealthbypass · business_email · business_email
- 10:13stealthbypass · marketing_copy · product_desc
- 12:06stealthbypass · discussion_board · discussion_post
- 12:24stealthbypass · marketing_copy · product_desc
- 12:42stealthbypass · news_article · news_article
- 13:01stealthbypass · marketing_copy · landing_copy
- 13:23stealthbypass · blog_post · listicle_blog
Penalties applied this cycle
How penalties work →The overall score shown above already reflects these deductions.
- Identical to input−2.0
The tool returned the input mostly unchanged. No real humanization happened.
- Meaning drift ×17−10.0
The output's meaning drifted significantly from the original input.
- Length inflation−1.0
The output ran much longer than the input, a common trick that pads text to dilute the AI signal.
- Length deflation ×21−10.0
The output came back much shorter than the input. The rewrite dropped content instead of paraphrasing it.
Minimum monthly pricing
- Monthly
- $4.99/mo
- Free tier
- Yes
How we tested
33 prompts across 7 writing categories, scored by 5 independent AI detectors. Every score is reproducible from the public methodology.
Evidence
In the September 2026 cycle we ran StealthBypass on 33 prompts and collected 128 detector verdicts on the outputs. 6 of those outputs were scored by all 5 detectors and called human-written by every one of them, and 17 were caught by at least one, 9 went unflagged but were scored by fewer than 5 detectors, and 1 run returned nothing scoreable. That is a stricter, all-or-nothing reading of the same verdicts the 78.6% bypass rate above averages: every input, output and score is published, so you can check it yourself.
Read all 33 StealthBypass outputs →Compare with
Featured in
Badges
StealthBypass is ranked in the September 2026 cycle, so it can embed any of these cards for free, and the live file re-renders every cycle, including when a rank falls. Usage rules →
Pinning a month for a press page? Use https://humanizerbench.com/badge/stealthbypass/september-2026.svg, which renders September 2026 forever.