Anthropic's Enterprise AI Subscription Share Rises to 41%, Surpassing OpenAI for the First Time
0xBroomberg
Anthropic's enterprise AI subscription share rose to 41% in May, overtaking OpenAI's 39.5% for the first time — and it happened right as the U.S. government was forcing its flagship models off the market.
Where does the 41% number come from?
The data comes from Ramp, a corporate spending platform tracking actual subscription payments across more than 70,000 business clients.
Anthropic hit 41% in May, up 2.5 percentage points from April; OpenAI slipped to 39.5%.
This means → this isn't a user survey or a benchmark ranking. It's real money spent by real companies — and Anthropic just took the top spot on that measure for the first time.
The government cracked down — so why did share go up?
The Trump administration invoked export controls, ordering Anthropic to block non-Americans from its latest models. The newly launched Mythos 5 and Fable 5 — public for just three days — were pulled entirely.
Back in March, Anthropic had already been labeled a "supply-chain risk" by the Defense Department after refusing to let its models be used for mass surveillance and fully autonomous weapons.
Ramp chief economist Ara Kharazian's read: being singled out as "too dangerous to use" created a massive halo effect. Anthropic's best-ever month for enterprise adoption was the very month it was flagged as a supply-chain risk.
When your model gets singled out as 'too dangerous to use,' that itself creates a massive halo effect.
Ara Kharazian
Chief Economist, Ramp
(June 2026, commenting on Anthropic's enterprise share data)
Models pulled — why weren't enterprise clients affected?
Ramp's data shows enterprise customers overwhelmingly use Anthropic's Opus series, not the pulled Mythos 5 or Fable 5.
Among the roughly one-third of transactions where the specific model is identifiable, spending clusters around Claude Opus versions, especially newer iterations.
In plain terms = Mythos 5 only opened to limited users in April; Fable 5 survived three days. Enterprises run their daily work on entirely different models, so the pulldown's financial impact was "likely quite limited."
Anthropic also shipped Opus 4.8 in late May, reinforcing its main product line.
Is subscription data just the tip of the iceberg?
Ramp is explicit: subscriptions are only one slice of enterprise AI spending.
The vast majority of corporate AI spend flows through API calls — usage billed per token (the unit of text or code a model processes), covering core workflows like code generation.
This means → Anthropic's real enterprise penetration may be even higher than the 41% subscription figure suggests — especially given Claude Code's reputation as a go-to enterprise programming tool, widely seen as a key growth driver.
Content is for reference only, not financial advice.