Anthropic Overtakes OpenAI in US Business Adoption for the First Time

[Oscar_38]

The May 2026 Ramp AI Index dropped this week with a result that most people in AI were not expecting to see quite yet. Anthropic's Claude has overtaken ChatGPT in US business adoption, measured by the corporate spend data that Ramp collects across more than 50,000 American businesses. Claude's share rose 3.8 percentage points in April to reach 34.4 percent. OpenAI's share fell 2.9 points to 32.3 percent. That is the first time Anthropic has led since the Ramp index began tracking this metric. A separate IDC survey paints a more cautious picture of Claude's enterprise reach and the two datasets do not fully reconcile, but the direction of travel in the Ramp data is clear. Businesses that were defaulting to ChatGPT are routing meaningful spend to Claude instead.

The context matters here. Anthropic has been aggressively targeting regulated industries including healthcare, finance and law with a safety-first positioning that resonates in sectors where hallucinations carry real legal and operational risk. Their enterprise revenue mix is around 80 percent of total revenue versus OpenAI's roughly 40 percent. They are also projecting break-even two years ahead of OpenAI. The timing is interesting given the Fable and Mythos shutdown the same week, which could have the paradoxical effect of reinforcing Anthropic's safety-focused brand with enterprise buyers even as it disrupts the product offering. A company that complies with government directives immediately and maintains data retention policies specifically to catch jailbreaks looks like a reliable partner to a regulated industry procurement team.

Is the Anthropic vs OpenAI race more interesting to you as a technology competition or a business model competition? And which do you think is better positioned heading into the IPO window?

[Always_David72]

Spend data from a corporate card platform is probably the most honest measure of enterprise AI adoption that exists. It cannot be gamed by prompt count or API call volume. Real money moving is real adoption