xAI ☆

xAI's defining achievement is industrial: Colossus in Memphis went from empty shell to a ~100,000-GPU training cluster in 122 days, then kept doubling — with on-site gas turbines bridging grid delays and a second gigawatt-class campus under way. Merged with X (Twitter) in March 2025, it trains the Grok family and monetizes through X subscriptions and an API.