How It Works
Gigawatt
A billion watts of electrical power — the unit AI infrastructure is now measured in. It matters because data-center plans are announced in gigawatts rather than square feet, and a gigawatt is roughly the output of one large nuclear reactor. When a company says it is building multiple gigawatts, it is saying it needs power-station quantities of electricity, which has to come from somewhere with a grid, a water supply and neighbors.
Origin · no single documented coiner
Not an AI term at all: the watt is an SI unit named after engineer James Watt, adopted internationally in 1960, and “giga-” is simply the prefix for a billion. Its arrival in AI conversation is recent, driven by the scale of data-center announcements from 2024 onward. Whenever you see one of these figures, check whether it describes capacity already built or a plan yet to be permitted — the two get quoted interchangeably.