Anthropic's compute deal with SpaceX nearly doubles to $84.5 billion in new IPO filing

Anthropic's compute bill just got a lot bigger, at least on paper. A confidential IPO prospectus reviewed by reporters this week shows the company could pay up to $84.5 billion through 2029 for Nvidia-based GPU capacity leased from SpaceX's Colossus 1 data center near Memphis, Tennessee — nearly double the approximately $45 billion figure SpaceX itself disclosed in its own IPO filing.

The arrangement traces back to an agreement first reported in May 2026: Anthropic agreed to pay SpaceX roughly $1.25 billion per month once the deal is fully ramped up, in exchange for access to a large share of the roughly 325,000 Nvidia GPUs housed across SpaceX's Colossus facilities. The new filing detail — that Anthropic's total obligation could run to $84.5 billion rather than $45 billion — suggests the deal's scope, duration, or GPU allocation grew substantially since the original terms were struck.

Why the gap between the two disclosures matters

SpaceX and Anthropic are both privately held companies preparing for public listings, and each company's IPO filing offers investors a different lens on the same transaction: SpaceX's filing values what it expects to receive as revenue, while Anthropic's filing has to account for the company's total forward financial obligations, including contingencies and potential expansions built into the contract. A nearly 2x gap between the two figures is unusual enough that it points to the deal having grown in scope since SpaceX's own disclosure, rather than a simple accounting discrepancy.

The payment structure works out to roughly $15 billion a year once fully operational by May 2029 — a figure that puts this single infrastructure contract in the same league as Anthropic's entire annualized revenue run rate, which reporting this week separately pegged near $65 billion for the company (versus OpenAI's newly disclosed $70 billion). Notably, the agreement can be terminated by either party with 90 days' notice, giving Anthropic an exit ramp if compute economics shift or cheaper capacity becomes available elsewhere.

The bigger picture: AI labs are buying compute, not just building it

Anthropic's SpaceX arrangement fits a broader pattern this year of frontier AI labs locking in massive compute commitments through leases rather than owning data center infrastructure outright. Google separately agreed to pay SpaceX roughly $920 million per month for compute capacity, according to earlier reporting, underscoring that SpaceX has quietly built a significant AI infrastructure leasing business alongside its rocket and satellite operations — one that may prove as consequential to SpaceX's valuation as Starlink or Starship.

For Anthropic, the scale of this commitment — alongside its previously reported infrastructure spending plans disclosed in its own IPO prospectus — illustrates just how compute-constrained the company says it remains, even as its revenue climbs. Locking in GPU capacity years in advance, at a cost that could reach tens of billions of dollars annually, is the price frontier labs are currently willing to pay to avoid being bottlenecked by chip supply as demand for their models grows.