OpenAI just lost its enterprise AI crown to Anthropic Attendees at Anthropic's developer conference in San Francisco Alistair Barr/Business Insider Anthropic has surpassed OpenAI in business AI adoption, according to Ramp's AI Index. Anthropic's rise has been driven by surging Claude Code adoption. AI market competition remains volatile, Ramp's economist said. Anthropic has crossed a symbolic threshold in the AI race: businesses are now spending more on Anthropic than OpenAI for the first time, according to one closely watched measure. New data from Ramp's AI Index shows Anthropic reached 34.4% business adoption in April, overtaking OpenAI at 32.3%, a dramatic reversal in a market OpenAI once dominated. Ramp helps companies pay their bills. It analyzes corporate card and bill-paying activity on its platform from more than 50,000 US businesses to track billions of dollars spent on AI services each month.…