Anthropic, the company behind Claude, has filed to go public. Tucked inside its prospectus is a number that matters a lot for Grok's maker: Anthropic has agreed to spend up to $120.5 billion renting computing power from SpaceX's AI arm.

An NVIDIA GB200 compute board at Computex in Taipei in June 2024, a file photo. Photo: Geekerwan / Wikimedia Commons (CC BY 3.0), cropped