Meta’s engineering team on October 19, 2026 published a detailed technical account of Prometheus, the company’s gigawatt-scale AI supercluster in New Albany, Ohio, confirming its completed first phase trained the Muse foundational models and that Meta plans to scale the system to roughly 1 million GPUs. In a post on Meta’s engineering blog, Kevin Lee, Yashar Bayani, Ahmed Sharif, and Yee Jiun Song wrote that the first phase trained the Muse family, including the Muse Wonder frontier models…