“Currently the world doesn't have any operational 1GW+ data centers. However, it is very likely we will see fully operational 1GW data centers before mid-2026.”

Gigawatt-scale sites did come online in the first half of 2026: xAI announced Colossus 2 in Memphis as the world's first gigawatt training cluster in early 2026, and Epoch AI and subsequent reporting counted roughly five facilities reaching 1 GW scale during 2026. The milestone was met, though several of the other GW-class campuses only crossed the threshold later in the year.