RL8 min read
xAI’s Colossus 2 – First Gigawatt Datacenter In The World, Unique RL Methodology, Capital Raise
Much has been written about xAI’s Colossus 1. The Memphis build belongs in the history books: the largest AI training cluster, erected from scratch in 122 days.
By Jeremie Eliahou OntiverosSemiAnalysis

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Originally published by SemiAnalysis on Sep 16, 2025.
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