Anthropic Is Worth $900 Billion. That Number Makes More Sense Than You Think.
The math behind the most important AI funding decision of 2026.
Anthropic is asking investors to submit allocations within 48 hours for a round expected to close within two weeks at a valuation of roughly $900 billion and a fundraise of $40 to $50 billion. That would make it more valuable than its closest rival.
Let's put the number in context before reacting to it.
Anthropic's annual revenue run rate has surpassed $30 billion, up from roughly $9 billion at the end of 2025. That's more than a 3x increase in four months. A large portion of that is driven by Claude Code and Cowork. Customers spending over $100,000 annually have grown 7x in the past year.
So the $900B valuation isn't being applied to a company at $9B ARR. It's being applied to a company that just tripled revenue in a single quarter and is still accelerating.
At $30B ARR, $900B is 30x revenue. That's high, but it's not insane for a company with those growth rates in a category that didn't exist three years ago. If the run rate hits $80-100B by year-end, that multiple compresses fast. Early investors from 2024 are reportedly skipping this round and waiting for the anticipated IPO instead. That tells you something about what they think the public market comp looks like.
The Mental Model: Expected Value
Expected Value is one of the models I write about in the book: Probability × Payoff. Most people see a $900B valuation and filter it through loss aversion. "That's too high, there's too much risk." But Expected Value forces you to do the math, not just the vibe check.
If you believe there's a 40% chance Anthropic reaches a $3T valuation at IPO and a 60% chance it plateaus around $500B, the expected value of the current entry is still above the ask. That's a rough version of the calculation every institutional investor in this round is running. The number isn't "does this feel expensive?" It's "what are the probability-weighted outcomes at exit?"
One institutional investor reportedly prepared to commit $5 billion hasn't even secured a meeting with Anthropic's CFO yet. That's not irrational exuberance. That's a buyer who's already done the EV math and doesn't want to miss the allocation.
The Contrarian Take
The risk everyone's avoiding talking about is infrastructure dependency. Amazon has committed up to $25 billion with 5 gigawatts of compute, Google has pledged up to $40 billion with another 5 gigawatts through a Broadcom joint arrangement. Anthropic's growth is real. Its dependence on two hyperscalers for the compute to sustain that growth is also real.
At $900B, you're paying for the revenue trajectory. You're also implicitly betting that Amazon and Google's infrastructure commitments hold, that no new model architecture makes today's compute-intensive training obsolete, and that enterprise customers keep converting at the current rate.
Those are good bets. They're not guaranteed bets.
The investors who get this right will have done the Expected Value math clearly, including the downside scenarios. The ones who get it wrong will have looked at the revenue number, skipped the denominator, and bought the story.
There's a version of this for every raise at every stage, including ours at /mkt. The discipline is the same: know your probability inputs before you commit to a payoff.