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A cheat sheet for why using ChatGPT is not bad for the environment
The idea that personal LLM use is environmentally irresponsible shows up *a lot* in many of the online spaces I frequent. I've [touched on my doubts around this](https://simonwillison.net/2024/Dec/31/llms-in-2024/#the-environmental-impact-got-better) in the …
Notably, Andy's calculations here are all based on the widely circulated higher-end estimate that each ChatGPT prompt uses 3 Wh of energy. A more recent estimate from February 2025 drops that to 0.3 Wh, which would make the hypothetical scenarios described by Andy 10x less costly again. There are much more credible things to warn people about with respect to careless LLM usage, and plenty of environmental measures that deserve their attention a whole lot more.
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