A large-scale study of 100K+ AI prompt responses across 100+ brands reveals a three-tier brand visibility ladder: global brands appear in 73% of answers, mid-market in 44%, and niche brands in just 11%. AI engines primarily cite corporate websites, with YouTube leading non-corporate sources, and best-of listicles accounting for 21% of citations. Sentiment in brand mentions is unstable, flipping six times more often than mere mention.