Colossus -- Building the World's Largest AI Supercomputer

xAI built Colossus, the world's largest AI training cluster, in just 122 days -- a feat that normally takes years. This module dives deep into the technical architecture, engineering decisions, and infrastructure innovations behind this 200,000+ GPU system, revealing what xAI values most in engineers: speed, first-principles thinking, and the ability to solve unprecedented problems.