The A.I. Daily
Sitefire trains classifier to detect AI content by structure
YC W26 startup Sitefire ported the StoryScope method to commercial web pages: it collected 2,250 pre-ChatGPT B2B blog posts from 268 company sites, had five models including GPT-5.4 rewrite each, and trained a classifier on 214 structural questions, reaching 98% accuracy separating AI from human posts.