Anthropic rents $45B of Nscale compute in West Virginia

Anthropic has agreed to rent roughly $45 billion of AI compute from Nscale, the UK-based infrastructure company founded in 2024. CNBC and TechCrunch reported the deal after Bloomberg first published it. The arrangement is a multi-year capacity lease, an operating commitment to pay for compute over time, not an equity stake in Nscale and not an acquisition.

The number the headline leaves out: six years

$45 billion is the term total, not an annual bill. The agreement runs six years, so it pencils out to roughly $7.5 billion a year of committed spend on this one contract. Against the 460 megawatts Anthropic is leasing at Nscale's West Virginia site, that is on the order of $16 million per megawatt-year all-in. The capacity runs on Nvidia's Vera Rubin systems and is expected to come online at the end of 2027.

What you can put in a model, and what you cannot

The hard numbers are 460 MW, end of 2027, a six-year term, and Vera Rubin silicon. Every figure traces to people familiar with the matter, and the arrangement is described as confidential and not yet a filed contract. Megawatts, dates and dollar totals in a capacity deal move between a term sheet and a signed lease, so 460 MW and end-2027 are the reported target, not a covenant.

Anthropic's reported $30 trillion TAM pitch to IPO investors is a valuation narrative. The Nscale lease is the cost side of that same business, the opex Anthropic is locking in to serve the demand the pitch assumes. The two figures do not net against each other.

Where it sits in the streak

Nscale, which already supplies Microsoft, is now a primary Anthropic landlord. This lands in a run of Anthropic capacity commitments: a roughly $10 billion arrangement tied to a Volta data center in Norway on a similar six-year shape, and a roughly $5 billion compute deal with AMD earlier this summer. The pattern is consistent: Anthropic is buying capacity years forward, from multiple providers, ahead of a planned listing.

The line to carry is 460 MW of Vera Rubin capacity in West Virginia, online at the end of 2027, on a six-year lease worth about $45 billion, or roughly $7.5 billion a year. Whether the megawatt figure holds when the contract is filed, and whether the end-2027 online date slips, will show if this specific deal is real as reported. Whether Anthropic's total forward-committed compute across Nscale, Volta, AMD and its cloud partners starts to outrun the revenue the IPO pitch is promising is a separate question.