Undetectable.ai
Undetectable.ai is an AI humanizer independently benchmarked by HumanizerBench. It ranked #2 of 13 in the July 2026 cycle with an overall score of 72.17/100 — 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
- 0:38undetectable · blog_post · listicle_blog
- 1:01undetectable · academic_essay · argumentative_essay
- 1:36undetectable · news_article · news_article
- 1:53undetectable · academic_essay · lit_review
- 2:08undetectable · marketing_copy · landing_copy
- 2:28undetectable · academic_essay · argumentative_essay
- 2:44undetectable · discussion_board · discussion_post
- 3:00undetectable · marketing_copy · product_desc
- 3:15undetectable · academic_essay · lit_review
- 3:32undetectable · application_essay · cover_letter
- 3:45undetectable · marketing_copy · landing_copy
- 4:59undetectable · blog_post · howto_blog
- 5:22undetectable · blog_post · howto_blog
- 5:36undetectable · discussion_board · discussion_post
- 5:50undetectable · marketing_copy · product_desc
- 6:12undetectable · application_essay · cover_letter
- 6:27undetectable · application_essay · personal_statement
- 6:44undetectable · application_essay · personal_statement
- 6:59undetectable · application_essay · personal_statement
- 7:14undetectable · blog_post · listicle_blog
- 7:27undetectable · marketing_copy · product_desc
- 7:39undetectable · academic_essay · lit_review
- 7:54undetectable · business_email · business_email
- 8:12undetectable · business_email · business_email
- 8:31undetectable · news_article · news_article
- 8:57undetectable · news_article · news_article
- 9:12undetectable · business_email · business_email
- 9:32undetectable · blog_post · howto_blog
- 9:58undetectable · marketing_copy · landing_copy
- 10:17undetectable · application_essay · cover_letter
- 10:36undetectable · discussion_board · discussion_post
- 11:19undetectable · blog_post · listicle_blog
- 11:35undetectable · academic_essay · argumentative_essay
Penalties applied this cycle
How penalties work →The overall score shown above already reflects these deductions.
- Length inflation ×26−10.0
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.