Anthropic closed a $65 billion Series H round this week at a $965 billion post-money valuation. Read that number again. The company behind Claude is now worth almost a trillion dollars while still private.

This is reportedly Anthropic’s final fundraise before going public. If the IPO happens at or near this valuation, it will be the largest tech offering in history, dwarfing Meta’s $104 billion debut in 2012 and Saudi Aramco’s $1.7 trillion listing in 2019.

The round itself rewrites the rules. At $65 billion, it’s larger than the entire venture capital market deployed in 2023. It’s more than double what Meta raised across all private rounds combined. For context, OpenAI’s most recent reported valuation was around $300 billion. Anthropic just leapfrogged that by a factor of three.

What changed

Anthropic was founded in 2021 by former OpenAI researchers who left over disagreements about the company’s direction. For years, it positioned itself as the “safety-focused” alternative, slower to ship, more cautious about capabilities. That branding worked with a certain type of enterprise customer but didn’t win the consumer zeitgeist.

Something shifted. The company’s Claude models have become genuinely competitive with GPT-4 and beyond in many benchmarks. More importantly, Anthropic has locked in major enterprise deals with companies that don’t want to hand all their data to Microsoft or Google. That enterprise traction translates to revenue, and revenue at this scale translates to valuations that would’ve seemed absurd 18 months ago.

The $65 billion raise also signals confidence from investors that the AI market isn’t a bubble about to pop. You don’t write checks this size unless you believe the addressable market is measured in trillions and the winner-takes-most dynamics are already playing out.

What it means for the market

Anthropic’s valuation creates a new benchmark. Every AI startup will now be measured against it. Investors will ask: are you building toward a $1 trillion outcome, or are you building a feature?

It also puts pressure on OpenAI, which has been the undisputed leader in mindshare and, until now, valuation. If Anthropic goes public at this number and the market holds, OpenAI will face questions about why it’s still private and what it’s waiting for.

For employees and early investors, the IPO will be a liquidity event of historic proportions. Anthropic’s early backers include Google, Salesforce Ventures, and Spark Capital. Google alone invested $2 billion in 2023. If that stake has grown proportionally, it’s now worth tens of billions.

The fundraise also cements the reality that foundation model companies require nation-state levels of capital. Anthropic will use this money to build bigger clusters, train larger models, and compete in the race for AGI or whatever we’re calling it this month. The bar for entry isn’t just high anymore. It’s existential.

The IPO question

Going public at a trillion-dollar valuation means the company needs to convince public market investors it can grow into that number. That’s a different conversation than convincing venture capital firms to bet on potential.

Anthropic will need to show durable revenue growth, margin expansion, and a path to profitability that doesn’t depend on raising another $50 billion in two years. Public investors care about cash flow and returns. If the company stumbles out of the gate, the repricing will be brutal.

But if it works, Anthropic won’t just be the biggest AI IPO ever. It will prove that foundation model companies can be built, scaled, and monetized at a level that justifies these valuations. That would be the real signal to the market: this isn’t hype. It’s infrastructure.