xAI Completes Colossus, the Memphis Supercluster, Billed as the World's Largest AI Supercomputer

xAI completed Colossus, a supercomputer built in Memphis and nicknamed the Memphis Supercluster, which the company described as the world's largest AI supercomputer as of January 2025. Colossus trains xAI's Grok models, and its scale is a direct input into how fast the company can iterate on new versions. The cluster's footprint has continued to grow since the initial buildout, and xAI now describes more than 1 million H100-equivalent GPUs, the specialized chips that train large AI models, running across two phases, Colossus I and II. xAI is a Parkway Venture Capital portfolio company.

Read the full article: xAI's Colossus supercomputer page