$15 billion a year. That's what Anthropic is paying SpaceX for access to its Colossus data centers in Memphis, Tennessee, according to details in SpaceX's S-1 IPO filing.
The compute partnership was announced earlier this month, but the price tag only became public through the IPO disclosure. The deal gives Anthropic access to Colossus - a massive facility SpaceX built in Memphis for AI training and inference (the hardware that runs AI models in production). SpaceX confirmed the figures in its S-1, making the arrangement one of the largest compute contracts in the AI industry.
To put $15 billion in context: that's roughly equivalent to Anthropic's total cumulative fundraising through early 2025, now being spent annually on compute alone. Training frontier AI models has always been expensive, but this figure makes clear just how capital-intensive the business has become - requiring hundreds of thousands of specialized chips running continuously for months at a time.
The deal also creates an unusual dynamic: a meaningful slice of Anthropic's revenue from Claude subscriptions and API access flows directly to Elon Musk's company. Musk has been publicly critical of Anthropic's organizational structure, and Anthropic CEO Dario Amodei has been openly skeptical of AI development practices at Musk-affiliated companies. Business relationships, apparently, survive public disagreements.
For Claude users, the practical upside is more compute capacity supporting model development and faster inference. The downside is that a $15 billion annual compute bill helps explain why AI API pricing remains high across the industry and why Anthropic continues to raise large capital rounds despite significant revenue growth.
SpaceX presenting this deal prominently in its IPO filing - not burying it in footnotes - signals that the Colossus data center business is becoming a meaningful revenue line for SpaceX, not a favor to a tech ally.