Anthropic committed $45 billion to rent AI cloud computing power from Nscale's West Virginia data center campus under a five-year agreement, according to a person familiar with the matter. The contract represents $9 billion in annual committed spend—more than triple Anthropic's estimated $2.7 billion annualized revenue run rate as of Q2 2025. Nscale, a data center operator backed by $13.6 billion in committed equity and debt from Carlyle Group and BlackRock Infrastructure, will dedicate roughly 1.2 gigawatts of its 2.8-gigawatt West Virginia campus to the contract.

The lock-in changes the structure of frontier AI economics. Anthropic is pre-paying compute capacity at fixed rates negotiated in early 2025, insulating the company from spot price volatility but removing optionality if training efficiency improves faster than expected. Nscale secures a creditworthy anchor tenant for 43% of its campus capacity before breaking ground on phases three and four. The deal includes take-or-pay provisions: Anthropic owes the full contract value regardless of utilization, though the company can sublease unused capacity to third parties after year two. West Virginia offered $427 million in tax abatements and power rate guarantees tied to the campus, which sources 680 megawatts from a dedicated natural gas plant operated under a 25-year power purchase agreement with FirstEnergy.

This is the first mega-contract where an AI lab commits capital expenditure at hyperscaler scale without owning the underlying infrastructure. Google, Microsoft, and Amazon each spent between $48 billion and $75 billion on capex in 2024, but they own the data centers and can repurpose or depreciate the assets. Anthropic's arrangement transfers residual value risk to Nscale while maintaining balance sheet flexibility—critical as the company negotiates its Series D at a reported $40 billion post-money valuation. The structure also signals that Anthropic's board expects frontier training runs to remain compute-bound rather than data-bound or algorithm-bound through at least 2029. If synthetic data or architectural breakthroughs reduce training costs by 60% or more before 2028, Anthropic will still owe Nscale the contracted amounts, creating a $27 billion to $35 billion stranded cost exposure depending on sublease recovery rates.

Operators should monitor three follow-on events. First, Nscale's $8.4 billion construction debt facility with JPMorgan and Goldman closes in September; the Anthropic contract likely satisfies the lender covenant requiring $32 billion in signed tenant commitments before first draw. Second, Anthropic's Series D term sheet, expected before October, will clarify whether the $45 billion liability sits on or off the company's balance sheet and whether new investors price in execution risk on multi-year training roadmaps. Third, watch whether Microsoft, Meta, or xAI negotiate similar dedicated-capacity deals with Vantage, Stack Infrastructure, or QTS in Q4 2025. If two or more announce comparable lock-ins, the frontier AI infrastructure model has permanently shifted from integrated capex to outsourced fixed commitments.

Nscale's campus is scheduled to reach full 2.8-gigawatt capacity by Q3 2027, eighteen months after Anthropic's compute draw begins.