Anthropic will pay Elon Musk’s SpaceX $1.25 billion a month over the next three years to rent space at the company’s xAI data centers, an IPO filing has revealed.

The IPO document, lodged with the US Securities and Exchange Commission ahead of rocket company SpaceX’s much-anticipated public listing later this year, lifts the lid on Musk’s company and its plans to deploy compute infrastructure in space.

Musk combined SpaceX with xAI, his AI start-up that has developed the Grok chatbot and built a cluster of data centers in Memphis, Tennessee, earlier this year. xAI, in turn, owns social media platform X, and together the companies could be valued at more than $1 trillion when they debut on the stock market.

SpaceX banks Anthropic billions, turns cloud provider

SpaceX announced earlier this month that it would be renting 300MW of data center space at its xAI data centers to Anthropic.