Anthropic Surpasses OpenAI at $900B Valuation: Inside the Fastest AI Funding Round Ever
TL;DR
Three months ago it was valued at $380B. Now it's closing a $30B round at $900B. Is Anthropic's latest fundraise rational market pricing, or the next AI bubble peak?
Three months. Anthropic’s valuation jumped from $380 billion to $900 billion, nearly tripling. This wasn’t a market reaction to a quarterly earnings beat. It’s the same company raising another $30 billion.
According to Bloomberg’s May 12 report, Anthropic has agreed to terms on a new funding round: $30 billion at a pre-money valuation of $900 billion. That figure surpasses OpenAI’s most recent $852 billion valuation, making Anthropic the highest-valued private AI company in the world, at least for now.
The Same Amount, Three Months Apart
In February 2026, Anthropic closed a $30 billion Series G round at a $380 billion valuation. The new round: same dollar amount, nearly three times the valuation, just three months later.
Four firms are co-leading: Dragoneer, Greenoaks, Sequoia Capital, and Altimeter Capital, each expected to commit at least $2 billion. CFO Krishna Rao ran the process. It took roughly two weeks from initial outreach to agreed terms. That pace would be unusual for a Series A, let alone a $30 billion megadeal. The round is expected to close by the end of May.
Revenue Is Doing the Heavy Lifting
A tripling valuation in three months sounds like 2021 crypto. The difference here is the revenue data.
At the end of 2025, Anthropic’s annualized revenue stood at roughly $9 billion. By April 2026, it had surpassed $30 billion. The company projects that figure will exceed $45 billion in the near term, ahead of OpenAI’s reported $24 billion annual run rate.
That’s more than fivefold growth in under six months. SaaS history has very few precedents for that trajectory, especially at this revenue scale.
The driver is enterprise adoption. Claude has gained significant traction among businesses choosing an AI assistant, and an earlier compute partnership with SpaceX added credibility to Anthropic’s infrastructure ambitions.
Why These Four Investors Said Yes
Sequoia, Altimeter, Greenoaks, and Dragoneer are all growth-stage investors. Three of the four have previously backed OpenAI. Reading that list, the subtext is clear. They’re not betting on an emerging market. They’re shifting weight from one horse to another.
At $900 billion, the implied revenue multiple is roughly 20x Anthropic’s projected annualized revenue. Nvidia trades around 25x P/S, Microsoft closer to 10x. The AI premium is still intact. But compared to the 2021-2023 wave of valuations built on “potential,” this one at least has a revenue curve underneath it.
Skeptics have a coherent case too: Anthropic isn’t profitable, model training costs remain high, and regulatory risk isn’t fully priced in. The math works if the growth rate holds. If it doesn’t, $900 billion is a long way to fall.
An IPO Is on the Table
Multiple sources indicate Anthropic is evaluating an IPO timeline as early as October 2026. After years of near-silence in the tech IPO market, that would be one of the most closely watched listings in recent memory.
A $900 billion private valuation sets a very high bar for public market pricing. The open question: will institutional investors in a public offering accept the same revenue multiples that private rounds are pricing in right now?
No one knows. But the question is concrete, and the answer will come faster than most people expect.
What This Means in Practice
For anyone building with AI APIs, buying enterprise AI tools, or tracking this market closely, a few practical takeaways.
Anthropic has the runway to maintain Claude’s competitive position. Aggressive API price cuts are less likely in the short term, and so are price hikes. OpenAI now faces a rival with more capital and faster revenue growth, which typically accelerates product release cycles across both companies.
The valuation sounds like a bubble. The revenue growth makes that harder to argue.
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