On April 7, Anthropic announced that its annualized revenue run rate had crossed $30 billion. Four months earlier, that number was $9 billion. The company that was blacklisted by the Pentagon, sued the federal government, and nearly lost its defense contracts just tripled its revenue in a single quarter.

OpenAI's most recently disclosed annualized revenue sits at approximately $25 billion, per The Information's February 2026 report. That means Anthropic now leads the most important metric in AI by a $5 billion margin. It is the first time Anthropic has held the revenue crown since either company started reporting numbers.

The Numbers Tell a Story of Acceleration

The growth trajectory is unlike anything in enterprise software. January 2025: $1 billion. August 2025: $5 billion. End of 2025: $9 billion. February 2026: $14 billion at the Series G close. April 2026: $30 billion. That is a 30x increase in 15 months.

Enterprise customers spending $1 million or more per year doubled from 500 to over 1,000 in less than two months following the Series G. CFO Krishna Rao described it as "exponential growth" in the company's customer base. Bloomberg and The Register independently confirmed the figures on the same day.

Claude Code Is the Engine

The single biggest driver behind the acceleration is Claude Code, Anthropic's agentic coding product. It became generally available in May 2025. By November, it had hit $1 billion in annualized revenue, faster than any enterprise software product Anthropic could find for comparison. By the Series G in February, Claude Code's run rate had more than doubled to $2.5 billion.

Engineering teams at Netflix, Spotify, KPMG, L'Oreal, and Salesforce are all running Claude Code. Ramp's Q1 2026 enterprise spending data showed Anthropic claiming 37% of trackable enterprise AI spend versus OpenAI's 33%. The coding tool is not just growing. It is pulling the entire company's revenue with it.

This explains how a company whose flagship product is a chat interface managed to outgrow a rival with 900 million weekly users. OpenAI has the consumer audience. Anthropic has the enterprise contracts. And enterprise contracts pay better.

The Infrastructure Play Behind the Numbers

Alongside the revenue milestone, Anthropic expanded its compute partnership with Google and Broadcom to roughly 3.5 gigawatts of Google TPU capacity coming online in 2027. It also signed a new agreement with Amazon for up to 5 gigawatts of capacity for training and deploying Claude. Between the two deals, Anthropic has locked in more AI compute than most countries.

The revenue milestone came tucked inside news of the Broadcom/Google partnership, but the real headline is the speed. From $1 billion to $30 billion in 15 months makes Anthropic one of the fastest-growing enterprise technology companies in history by revenue run rate.

The IPO Clock Is Ticking

A week after the revenue announcement, Bloomberg reported that Anthropic is fielding unsolicited investor offers at valuations of approximately $800 billion, more than double the $380 billion post-money valuation it closed in February. The company has not accepted.

Anthropic is in early talks with Goldman Sachs, JPMorgan, and Morgan Stanley about a potential IPO that could come as soon as October 2026. A company that did not exist four years ago is now generating more revenue than OpenAI and negotiating an IPO at a valuation that would make it one of the most valuable companies on Earth.

Two Caveats Worth Noting

Run-rate revenue is a snapshot, not a full-year figure. It extrapolates the most recent month to twelve months. A spike in enterprise contract signings can move the number faster than actual collected revenue. And OpenAI has not updated its disclosed ARR since February. If OpenAI's revenue has moved upward, the $5 billion gap could narrow.

But the direction matters. Anthropic grew its run rate from $9 billion to $30 billion in roughly four months. OpenAI's pace of disclosed growth has slowed from the sequential jumps it reported through 2025. The competitor that was supposed to be the safety-focused underdog is now the revenue leader. The competitor that raised $122 billion at an $852 billion valuation is now the one playing catch-up on the metric that actually determines whether any of this is a real business.

First reported by Anthropic (April 7 announcement). Additional reporting from Bloomberg, The Register, TechCrunch, The Information, and NerdLevelTech.