The AI valuation race just flipped. Anthropic closed a $65 billion Series H round on May 28 that values the Claude maker at $965 billion post-money, surpassing OpenAI for the first time and putting the company within striking distance of the trillion-dollar threshold before a single share trades publicly.
To put that number in context: $65 billion is larger than the entire market capitalizations of companies like General Motors or FedEx. And Anthropic raised it in a single private round, co-led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, with each lead investor committing more than $2 billion.
How the Round Ballooned
The fundraise started smaller. When Bloomberg first reported in May that Anthropic was in talks for a $30 billion raise at roughly $900 billion, it was already the largest private AI round ever contemplated. The final close more than doubled that figure. TechCrunch reported the $65 billion total includes $15 billion from previously committed hyperscaler investments, including $5 billion from Amazon announced in April.
The investor list reads like a who’s who of growth-stage capital: Baillie Gifford, Blackstone, Brookfield, Coatue, D.E. Shaw Ventures, DST Global, D1 Capital Partners, and Fidelity Management & Research all participated. Strategic infrastructure partners Samsung, SK Hynix, and Micron joined as well, a signal that the chip supply chain wants skin in the game with the companies burning through their product.
The OpenAI Overtake
This is the headline that will circulate in every boardroom where AI investment decisions get made. Anthropic’s $965 billion valuation eclipses OpenAI’s most recent mark, making the Claude maker the world’s most valuable AI startup. That was not a foregone conclusion even six months ago, when OpenAI’s GPT franchise and its Microsoft relationship seemed to give it an insurmountable lead in enterprise mindshare.
What changed is execution. Anthropic’s Claude Code product has been ramping aggressively in enterprise, with the company reportedly running at over a $30 billion annual revenue rate. Claude Mythos Preview and Project Glasswing, the company’s defensive cybersecurity initiative that found more than 10,000 high-severity vulnerabilities in critical software within its first 30 days, have given Anthropic a product narrative that extends beyond chatbots into infrastructure-grade AI.
OpenAI, meanwhile, has been navigating its own massive fundraise and a prospective IPO, while dealing with the organizational complexity of its profit-cap transition. The valuation leapfrog does not mean Anthropic has won the AI race. It means the market is pricing in a credible second horse.
Follow the Money: What $965 Billion Implies
The valuation implies the market expects Anthropic to generate somewhere in the range of $50 billion to $80 billion in annual revenue within a few years, depending on what multiple you apply. That is not impossible given the trajectory, but it requires the AI infrastructure buildout to continue at its current pace and for Anthropic to hold or expand its share of enterprise compute contracts.
The round also positions Anthropic for what most observers expect will be an IPO within the next 12 to 18 months. At $965 billion, the company is too large and too broadly held to remain private indefinitely. The Series H may be its last private raise.
The Chip Partners Are Not Passive Investors
One detail in the investor list deserves separate attention. Samsung, SK Hynix, and Micron, the three companies that manufacture virtually all of the world’s high-bandwidth memory chips, all participated in this round. These are not financial investors chasing returns. They are supply-chain partners locking in demand visibility.
When a memory manufacturer invests in Anthropic, it is buying a front-row seat to the company’s compute roadmap. Anthropic’s training runs and inference clusters consume enormous quantities of HBM and custom silicon. Having the chip suppliers as equity holders aligns incentives on capacity planning: Samsung and SK Hynix get better demand signals, and Anthropic gets preferential access during allocation crunches. In a world where AI training compute is constrained by physical hardware availability, that alignment matters more than the capital itself.
The Bigger Picture for AI Capital Markets
This round lands in the same week that Dell surged 30% on AI server demand, Snowflake rallied 38% on a $6 billion AWS deal, and Samsung jumped 6.5% after shipping the first HBM4E memory chips. The pattern is unmistakable: every layer of the AI stack, from chips to cloud to models, is repricing upward simultaneously.
The risk, as always, is that the capital is flowing faster than the revenue can follow. Anthropic’s $65 billion round is a bet that AI adoption is still accelerating, that enterprise budgets for AI infrastructure will continue to grow at triple-digit rates, and that the model layer will capture durable margin rather than commoditizing. Those are reasonable assumptions today. Whether they hold through 2028 will determine if this valuation looks prescient or frothy.
For now, the scoreboard reads: Anthropic $965 billion, OpenAI somewhere behind. In the AI capital markets, that lead is measured in months, not years.