SpaceX completed a 100MW Colossus data center in 122 days and Colossus II in 91 days according to its S-1 filing, beating the typical two-year industry benchmark
— Colossus II trains Grok-5 on NVIDIA GB200 and GB300 processors.
Positive users praise SpaceX for building Colossus AI data centers in a record 91 days to train Grok-5 while negative users accuse Musk of broken promises and corporate welfare.