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The $900 Billion Giant: How Anthropic Got So Big, So Fast

Anthropic has surpassed OpenAI as the most valuable artificial intelligence company, reaching a $900 billion valuation after a $65 billion fund-raising round. The company’s rise was fueled by its Claude models and the Claude Code programming tool, which drove a surge in adoption by automating software development. The valuation shift reflects the rapidly evolving competitive landscape in the AI industry.

read1 min publishedMay 29, 2026

Newsletter

DealBook #

The artificial intelligence giant was just valued at $900 billion, surpassing OpenAI. Here are the numbers behind its rise — and headwinds it faces.

Andrew here. Anthropic is now more valuable than OpenAI, something Silicon Valley wouldn’t have expected a year ago. We go behind the numbers — and outline the risks the new leader in A.I. faces.

Also: Lauren Hirsch has a scoop on deal talks between iHeartMedia and SiriusXM, which were put on . And Dell’s stock is flying, raising new questions about President Trump’s investments in the computer giant.

The numbers behind Anthropic’s rise #

A year ago, the biggest and buzziest artificial intelligence start-up around was undoubtedly OpenAI. That’s no longer the case.

Anthropic has taken that crown with its $65 billion fund-raising round. How the company went from also-ran to 900-pound gorilla is a reflection of the current state of the A.I. race, and it raises questions about what comes next.

Where things stand: Anthropic is valued at $900 billion, while OpenAI was last valued at $730 billion, not including the $122 billion it had just raised.

Behind Anthropic’s ascent: The company’s Claude models were consistently highly regarded. But by November, Anthropic’s Claude Code programming tool had become exponentially better at automating software development, driving a surge in adoption.

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