Anthropic signs $1.25B/month compute deal with SpaceX — full Colossus capacity, $40B+ total contract through 2029

Anthropic and SpaceX announced a $1.25 billion per month compute partnership giving Anthropic full access to xAI's Colossus 1 data center in Memphis. The Memphis cluster delivers 300+ megawatts and houses 220,000+ NVIDIA H100/H200/GB200 GPUs. Anthropic ramps to 100% utilization within May 2026, with discounted pricing through June 2026 before full rates apply. SpaceX disclosed the contract in its IPO filing Wednesday.

The deal is structurally novel — it's the first time a major frontier lab leases an entire hyperscale cluster from another major frontier lab's parent company. Anthropic gets the compute capacity to keep up with OpenAI's training cadence; SpaceX gets a $40B+ revenue backstop that materially de-risks the IPO. The 220,000-GPU footprint roughly doubles Anthropic's effective training-stage compute access overnight.

The under-priced read is the supply-chain implication. Anthropic explicitly framed the Q1 2026 valuation round as needed to fund compute. Now Anthropic is paying $15B/year — half the $30B raise — on a recurring compute lease rather than amortizing chip purchases. The economic model shifts from 'own the substrate' toward 'lease at scale.' If the frontier lab business converges to that model, the chip-vendor moat strengthens (NVIDIA, AMD continue selling) and the lab-vendor moat moves entirely to model IP plus customer relationships.

TechCrunch — Anthropic xAI $1.25B/month → · Axios — Anthropic SpaceX $15B/year → · xAI — new compute partnership with Anthropic →