Anthropic locks in a 20-year, $9.1B data center deal with a Bitcoin miner in Texas

Anthropic just signed a $9.1 billion lease with Bitcoin miner Riot Platforms for a data center in Rockdale, Texas — 191 megawatts of capacity, enough to power about 143,000 homes. Riot disclosed the deal alongside its quarterly earnings on Wednesday but only described the tenant as a “leading frontier AI lab.” Bloomberg subsequently identified Anthropic as the mystery customer, citing people familiar with the matter.

Riot isn’t just handing over the keys. The company will build the facility to Anthropic’s specifications, handling the structure, power connections, cooling, and day-to-day operations. Anthropic brings its own servers and AI chips. The initial lease runs 20 years, but two extension options could push the total value to $16.1 billion if exercised. The first 96 megawatts come online in December 2027, with the remaining capacity following in June 2028.

This isn’t a one-off infrastructure bet. Anthropic is already paying SpaceX an estimated $1.25 billion per month through May 2029 for the Colossus 1 data center, plans to deploy two gigawatts of AMD GPUs, and has Amazon investing up to $25 billion while building five gigawatts of Trainium capacity. Add to that gigawatts of TPU capacity from Google and Broadcom starting in 2027, plus a six-year, $10 billion contract with Volta Infra. The company is essentially assembling a multi-vendor compute empire.

What’s striking here is the sheer physical scale required to compete at the frontier. Anthropic isn’t just buying cloud credits — it’s locking in power grids, construction timelines, and specialized cooling systems years in advance. Riot pivoting from Bitcoin mining to AI hosting also tells you something about where the real demand for energy infrastructure now sits. The question nobody’s asking out loud: at what point does securing this much capacity stop being strategic and start being a bet that future models will actually need it all?