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Musk Says SpaceX Leased Colossus to Anthropic for Six Months

This raises questions about Anthropic's long-term access to scarce GPUs by highlighting investor exposure to SpaceX's AI losses.

A 3D-printed miniature model of Elon Musk and a SpaceX logo are seen in this illustration created on January 23, 2025. REUTERS/Dado Ruvic/Illustration/File Photo

Overview

  • Elon Musk said on May 28 that SpaceX agreed to a 180‑day lease for its Colossus AI training clusters with a mutual 90‑day cancellation notice after that.
  • SpaceX's IPO S‑1, filed earlier in May, disclosed deals that show Anthropic paying about $1.25 billion per month for Colossus capacity through May 2029 while also stating both parties can terminate with 90 days' notice.
  • The S‑1 reported the company's AI segment lost roughly $2.5 billion from operations in the March quarter on $818 million of segment revenue, a figure that frames investor exposure to the compute business.
  • Anthropic shifted workloads onto Colossus this month to relieve urgent GPU shortages as part of a broader multi‑vendor plan that includes cloud providers and other partners.
  • The gap between Musk's short‑term lease claim and the filing's long payment schedule creates contractual ambiguity that could force compute reallocation, disrupt Anthropic's services, and concentrate financial and local operational risk.