How Much Energy Does ChatGPT Use?
How much energy does ChatGPT use? A single query uses about 0.34 watt-hours of electricity, according to OpenAI CEO Sam Altman, roughly what an oven draws in a little over one second. Independent analysis by Epoch AI puts a typical GPT-4o query near 0.3 Wh, about the same as one Google search. The catch is that heavier models reverse this; researchers estimate GPT-5 averages around 18 watt-hours per query, with complex answers reaching 40 Wh. Across 2.5 billion queries a day, even the small number adds up to roughly 310 GWh a year. This guide gives you a dated, sourced answer for every version of the question, so per query, […]
