The Vendor Crossover Doctrine: Anthropic Just Passed OpenAI In Business Spend, And Your Default AI Vendor May Be Wrong For The Next 12 Months
For the first time since ChatGPT launched in November 2022, more US businesses pay Anthropic than OpenAI. Ramp AI Index May 2026 (published June 9) shows Anthropic at 41% vs OpenAI at 39.5% across 70,000+ companies. Anthropic grew from 0.03% adoption in June 2023 to 41% in May 2026, with annualized revenue climbing from $1B to $47B in 15 months. Claude Code alone is $2.5B annualized at 54% of enterprise coding spend. Run The Vendor Crossover Doctrine 5-question audit on every AI vendor charging more than $100/month.



