Today, the rapid rise of AI is fueling a new arms race for compute power. Tech companies are rapidly building AI supercomputers, also known as GPU clusters or AI datacenters, by packing them with ever-growing numbers of chips for training advanced AI models. So far, the U.S. has taken the lead, as Big Tech firms pour billions into AI infrastructure to secure a competitive edge. This graphic shows the world’s leading compute clusters, based on data from Epoch AI. Below, we show the most powerful AI supercomputers in the world as of mid-2025: {table} xAI’s Colossus Memphis Phase 2 tops the chart with 200,000 H100 ... (full story)