Anthropic’s compute book hits $517 billion, report says

Anthropic has locked roughly $517 billion of compute commitments covering about 14.8 gigawatts of capacity in the 11 months through August 2026, according to a The Information tally carried by Data Center Dynamics and other secondary digests — nearly three times the about $180 billion in server-leasing spend through 2029 Anthropic previously told investors, those reports say.

Compute and power sit in the same number: the compilation measures capacity in gigawatts because the data centers that deliver training and inference load the grid. Secondaries attribute the largest share to Amazon and Alphabet together — about 11 GW and more than $300 billion over roughly a decade — with other named counterparties in the same reporting chain including Microsoft Azure, SpaceX/Colossus-class capacity, Fluidstack, Nscale, and Lambda.

Read the figure as a contracted-capacity book, not a cash burn line. The Information’s reconstruction sums announced and reported agreements; it is not an Anthropic earnings disclosure, and Anthropic had not, in the coverage checked here, endorsed the $517B total. Deal terms differ on duration, take-or-pay, and whether every megawatt is ever drawn.

Stake: Anthropic’s IPO calendar and any S-1 that must reconcile lease/cloud obligations; Amazon, Google, Microsoft, and neocloud counterparties on the other side of the capacity; investors comparing the $180B-through-2029 message to the larger compiled book; power and data-center markets watching 14.8 GW of named demand.

What’s next: Anthropic prospectus or earnings language that confirms, cuts, or reclassifies the book; named HSR/EU or other filings are separate from this money story; any company denial or restatement of the $180B investor figure.

— Nico Valdez