{"cycle":{"id":"2026-09","label":"September 2026","runDate":"2026-09-03T16:11:14.775Z","methodologyVersion":"1.0.0","status":"official","samplesPerHumanizer":33,"detectors":["gptzero","winston","originality","zerogpt","grammarly","quillbot","copyleaks"],"categories":["academic_essay","application_essay","blog_post","business_email","marketing_copy","discussion_board","news_article"]},"leaderboard":[{"rank":1,"name":"UndetectedGPT","url":"https://www.undetectedgpt.ai","slug":"undetectedgpt","composite":84.9,"bypassRate":0.8626,"meaningPreservation":0.8476,"readability":0.7733,"consistency":0.9146,"penalties":[],"perDetector":{"gptzero":0.8001,"winston":0.5445,"originality":0.7918,"zerogpt":0.8508,"grammarly":0.8933,"quillbot":0.9265,"copyleaks":0.2121},"perCategory":{"academic_essay":89.2,"application_essay":86.2,"blog_post":77.6,"business_email":79.7,"marketing_copy":85.8,"discussion_board":90.3,"news_article":85.9},"testsCompleted":33},{"rank":2,"name":"SmartHumanizer","url":"https://smarthumanizer.ai","slug":"smarthumanizer","composite":84.8,"bypassRate":0.8528,"meaningPreservation":0.876,"readability":0.7573,"consistency":0.8826,"penalties":[],"perDetector":{"gptzero":0.71,"winston":0.51,"originality":0.7818,"zerogpt":0.8262,"grammarly":0.8691,"quillbot":0.9423,"copyleaks":0.1515},"perCategory":{"academic_essay":89.8,"application_essay":83.3,"blog_post":82.4,"business_email":75.6,"marketing_copy":89.2,"discussion_board":88.3,"news_article":79.3},"testsCompleted":33},{"rank":3,"name":"WriteHuman","url":"https://writehuman.ai","slug":"writehuman","composite":81.6,"bypassRate":0.9038,"meaningPreservation":0.7618,"readability":0.7236,"consistency":0.8642,"penalties":[{"code":"length_inflation","occurrences":1,"delta":1}],"perDetector":{"gptzero":0.5648,"winston":0.8212,"originality":0.5916,"zerogpt":0.9195,"grammarly":0.9418,"quillbot":0.9224,"copyleaks":0.6364},"perCategory":{"academic_essay":86.2,"application_essay":84.9,"blog_post":80.6,"business_email":69.5,"marketing_copy":86.2,"discussion_board":83.1,"news_article":79.6},"testsCompleted":33},{"rank":4,"name":"GPTinf","url":"https://gptinf.com","slug":"gptinf","composite":78.3,"bypassRate":0.7986,"meaningPreservation":0.757,"readability":0.767,"consistency":0.8222,"penalties":[],"perDetector":{"gptzero":0.698,"winston":0.6297,"originality":0.3378,"zerogpt":0.8517,"grammarly":0.8761,"quillbot":0.849,"copyleaks":0.5758},"perCategory":{"academic_essay":85.3,"application_essay":79.5,"blog_post":75,"business_email":61.8,"marketing_copy":81.7,"discussion_board":82.9,"news_article":73.2},"testsCompleted":33},{"rank":5,"name":"AI Humanize","url":"https://aihumanize.io","slug":"aihumanize","composite":76.1,"bypassRate":0.8263,"meaningPreservation":0.7077,"readability":0.747,"consistency":0.6793,"penalties":[],"perDetector":{"gptzero":0.5536,"winston":0.8103,"originality":0.2321,"zerogpt":0.8711,"grammarly":0.8839,"quillbot":0.8925,"copyleaks":0.6667},"perCategory":{"academic_essay":83.1,"application_essay":74.7,"blog_post":79.7,"business_email":41.5,"marketing_copy":82.7,"discussion_board":73,"news_article":82.2},"testsCompleted":33},{"rank":6,"name":"HIX Bypass","url":"https://bypass.hix.ai","slug":"hix-bypass","composite":73.8,"bypassRate":0.7317,"meaningPreservation":0.8082,"readability":0.6376,"consistency":0.6989,"penalties":[],"perDetector":{"gptzero":0.1573,"winston":0.6906,"originality":0.2462,"zerogpt":0.86,"grammarly":0.88,"quillbot":0.889,"copyleaks":0.5455},"perCategory":{"academic_essay":83.4,"application_essay":71,"blog_post":73.3,"business_email":40.2,"marketing_copy":80.4,"discussion_board":69.5,"news_article":85.7},"testsCompleted":33},{"rank":7,"name":"StealthGPT","url":"https://stealthgpt.ai","slug":"stealthgpt","composite":71.9,"bypassRate":0.7463,"meaningPreservation":0.7012,"readability":0.8267,"consistency":0.7847,"penalties":[{"code":"severe_meaning_drift","occurrences":3,"delta":3}],"perDetector":{"gptzero":0.7823,"winston":0.6209,"originality":0.4818,"zerogpt":0.6648,"grammarly":0.7755,"quillbot":0.6598,"copyleaks":0.5758},"perCategory":{"academic_essay":80,"application_essay":66.5,"blog_post":76.6,"business_email":81.3,"marketing_copy":85,"discussion_board":57.2,"news_article":68.8},"testsCompleted":33},{"rank":8,"name":"SuperHumanizer","url":"https://superhumanizer.ai","slug":"superhumanizer","composite":68.5,"bypassRate":0.707,"meaningPreservation":0.773,"readability":0.7403,"consistency":0.7276,"penalties":[{"code":"length_inflation","occurrences":5,"delta":5}],"perDetector":{"gptzero":0.64,"winston":0.5227,"originality":0.5081,"zerogpt":0.7871,"grammarly":0.7682,"quillbot":0.7456,"copyleaks":0.5137},"perCategory":{"academic_essay":82.4,"application_essay":64.5,"blog_post":68.1,"business_email":57.1,"marketing_copy":77.6,"discussion_board":81.3,"news_article":85.5},"testsCompleted":33},{"rank":9,"name":"CleverHumanizer","url":"https://cleverhumanizer.ai","slug":"cleverhumanizer","composite":66.8,"bypassRate":0.865,"meaningPreservation":0.6534,"readability":0.7321,"consistency":0.8883,"penalties":[{"code":"severe_meaning_drift","occurrences":4,"delta":4},{"code":"length_inflation","occurrences":7,"delta":7}],"perDetector":{"gptzero":0.8999,"winston":0.7045,"originality":0.6701,"zerogpt":0.7791,"grammarly":0.9688,"quillbot":0.8882,"copyleaks":0.5317},"perCategory":{"academic_essay":81.4,"application_essay":71.7,"blog_post":81.5,"business_email":68.3,"marketing_copy":79.1,"discussion_board":77.6,"news_article":82.9},"testsCompleted":33},{"rank":10,"name":"ReHumanize","url":"https://rehumanize.io","slug":"rehumanize","composite":39,"bypassRate":0.037,"meaningPreservation":0.5915,"readability":0.8142,"consistency":0.9513,"penalties":[{"code":"severe_meaning_drift","occurrences":2,"delta":2},{"code":"length_inflation","occurrences":2,"delta":2}],"perDetector":{"gptzero":0.0573,"winston":0,"originality":0.0006,"zerogpt":0.3256,"grammarly":0.6424,"quillbot":0.219,"copyleaks":0.0303},"perCategory":{"academic_essay":38.1,"application_essay":42,"blog_post":47.2,"business_email":47.1,"marketing_copy":44.6,"discussion_board":38.9,"news_article":43.4},"testsCompleted":33},{"rank":11,"name":"Undetectable AI","url":"https://undetectable.ai","slug":"undetectable-ai","composite":38.2,"bypassRate":0.0024,"meaningPreservation":0.8961,"readability":0.717,"consistency":0.996,"penalties":[{"code":"length_inflation","occurrences":19,"delta":10},{"code":"identical_to_input","occurrences":1,"delta":2}],"perDetector":{"gptzero":0.0611,"winston":0.0015,"originality":0,"zerogpt":0.2648,"grammarly":0.1852,"quillbot":0.1657,"copyleaks":0},"perCategory":{"academic_essay":48,"application_essay":47.8,"blog_post":52.9,"business_email":50.9,"marketing_copy":50.9,"discussion_board":50.8,"news_article":51.6},"testsCompleted":33}]}