https://vectorspacelab.com/blog Notes on design, engineering, research and the products we build at Vector Space Lab. https://vectorspacelab.com/blog/ai-energy-efficiency-vs-brain https://vectorspacelab.com/blog/ai-energy-efficiency-vs-brain Sat, 01 Aug 2026 00:00:00 GMT Your brain runs on about 20 watts — roughly a dim light bulb. Training a single large model can burn through gigawatt-hours. Here's why the gap is so big, and what it would actually take to close it.