xAI Built Massive Computer in 4 Months, Not 2 Years

xAI finished Colossus, a supercomputer using 150,000 graphics processors, in four months—six times faster than the typical industry pace. The company sidestepped common delays by using existing data centers and established supplier relationships. Colossus now runs reliably 99% of the time, with plans to expand to 1 million processors.