Undetectable.ai
Undetectable.ai is an AI humanizer independently benchmarked by HumanizerBench. It ranked #8 of 12 in the August 2026 cycle with an overall score of 61.49/100 — our composite measure of how reliably it evades AI detectors while preserving the original meaning and readability.
Detector Bypass Rates
Percentage of samples classified as human-written by each detector.
Performance by Category
Bypass rate across writing contexts.
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
- 0:24undetectable · academic_essay · lit_review
- 0:54undetectable · marketing_copy · landing_copy
- 1:34undetectable · academic_essay · argumentative_essay
- 2:02undetectable · news_article · news_article
- 2:30undetectable · application_essay · personal_statement
- 2:53undetectable · application_essay · cover_letter
- 3:27undetectable · blog_post · listicle_blog
- 4:00undetectable · academic_essay · lit_review
- 4:36undetectable · marketing_copy · landing_copy
- 5:12undetectable · application_essay · cover_letter
- 5:41undetectable · blog_post · howto_blog
- 6:36undetectable · academic_essay · lit_review
- 6:56undetectable · news_article · news_article
- 7:20undetectable · business_email · business_email
- 8:36undetectable · business_email · business_email
- 8:56undetectable · blog_post · howto_blog
- 9:17undetectable · blog_post · listicle_blog
- 9:38undetectable · marketing_copy · product_desc
- 9:54undetectable · application_essay · personal_statement
- 10:10undetectable · discussion_board · discussion_post
- 10:26undetectable · discussion_board · discussion_post
- 10:44undetectable · academic_essay · argumentative_essay
- 11:00undetectable · marketing_copy · product_desc
- 11:16undetectable · academic_essay · argumentative_essay
- 11:35undetectable · marketing_copy · product_desc
- 11:51undetectable · marketing_copy · landing_copy
- 12:09undetectable · news_article · news_article
- 12:28undetectable · business_email · business_email
- 12:49undetectable · application_essay · personal_statement
- 13:15undetectable · discussion_board · discussion_post
- 13:35undetectable · blog_post · listicle_blog
- 14:13undetectable · application_essay · cover_letter
- 14:37undetectable · blog_post · howto_blog
Penalties applied this cycle
How penalties work →The overall score shown above already reflects these deductions.
- Meaning drift ×3−3.0
The output's meaning drifted significantly from the original input.
- Length inflation ×24−10.0
The output ran much longer than the input, a common trick that pads text to dilute the AI signal.
Minimum monthly pricing
- Monthly
- $19.00/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.