Anthropic's Claude Is Winning the Enterprise AI Race
eWeek, Thursday, May 14th, 2026
A year ago, OpenAI was 'pulling well ahead of rivals' in the enterprise race. Per Ramp's May 2025 AI Index (Ramp is an expense management platform that tracks actual corporate credit card spend), OpenAI had 32% of US business adoption. Anthropic? A distant 8%.
That gap is now gone. - Ramp's May 2026 AI Index shows Anthropic at 34.4% of business adoption, crossing OpenAI (now at 32.3%) for the first time ever. All of these came from purchase data from thousands of actual companies.