Sources said SpaceX has decided to lease the full capacity of its Memphis Colossus 1 data center to Anthropic after encountering technical challenges developing and running the Grok AI model there. SpaceX had planned a three-site cluster to train frontier models but ran into latency when linking Colossus 1 with two other sites over 10 miles away; aging network infrastructure and hardware heterogeneity—Colossus 1 hosts multiple generations of NVIDIA chips including Hopper and Blackwell plus older

Sources said SpaceX has decided to lease the full capacity of its Memphis Colossus 1 data center to Anthropic after encountering technical challenges developing and running the Grok AI model there. SpaceX had planned a three-site cluster to train frontier models but ran into latency when linking Colossus 1 with two other sites over 10 miles away; aging network infrastructure and hardware heterogeneity—Colossus 1 hosts multiple generations of NVIDIA chips including Hopper and Blackwell plus older accelerators, while Colossus 2 and 3 are built more uniformly around NVIDIA Blackwell—impeded integration.