Anthropic Surpasses OpenAI in Business Spending as Government Ban Rattles IPO Prospects

Anthropic ended May by overtaking OpenAI in business market share for the first time, according to data from Ramp, with AI subscriptions rising to 41% against OpenAI’s 39.5%. The milestone coincided with a $65 billion raise at a near-trillion-dollar valuation and the confidential filing of IPO paperwork off the back of its first profitable quarter.

The momentum was disrupted when the Trump administration ordered Anthropic to restrict non-Americans from accessing its advanced Mythos 5 and Fable 5 models, effectively pulling both from market. The White House cited export control directives, though the precise rationale remained unclear. The ban follows an earlier Department of Defensedesignation of Anthropic as a supply-chain risk after the company refused to permit its models for mass surveillance or autonomous weapons.

Ramp economist Ara Kharazian suggested the controversy could paradoxically strengthen Anthropic’s appeal, noting that business adoption peaked during the previous DoD dispute. Enterprise usage remains concentrated on the Claude Opus model family, with Opus 4.8 released in late May and still widely available.