Think twice before you type a long, detailed request to ChatGPT or Gemini. Every character you enter consumes energy—much more than you might expect.
A recent study from the United Nations University Institute for Water, Environment and Health highlights a startling picture of AI’s carbon footprint. The figures are eye‑opening and should make you reconsider the next time you fire off a request to your favorite chatbot.
The report notes that ChatGPT alone handles roughly 2.5 billion prompts each day. At a modest 0.42 Wh per prompt, that translates to about 383 GWh of electricity annually—enough to power almost 3 million people in Sub‑Saharan Africa.
Does prompt length matter?
Yes. The study finds that longer prompts directly increase the energy usage of AI chatbots. It points to a “concise mode” concept, where shorter inputs consume less power because inference energy scales with the number of tokens processed.
If concise mode trimmed tokens by just 30 % in everyday chats, cutting per‑query energy by roughly 25 %, we could save between 87 and 98 GWh each year. That is comparable to the yearly residential electricity consumption of up to 756 000 households.
Task type matters even more
The same principle applies to the kind of AI work you request. A typical text query to ChatGPT uses about 200 times more energy than a basic spam‑filtering operation. Generating a single AI image consumes 2.9 Wh—about 60 times the energy of a short text answer. Video generation is even more demanding, with complex clips requiring over 415 Wh each.
It’s hard to swallow that AI‑generated videos, which already flood our streaming platforms, also drain such huge amounts of electricity.
What can you do?
You don’t have to abandon AI if it helps with daily tasks or work. However, avoid using it for frivolous memes or low‑value content.
Next time you ask ChatGPT a simple question, keep it brief—skip the pleasantries, get straight to the point, and opt for a lighter model when the job doesn’t need heavy computation. Small, collective habits can lead to a surprisingly large impact.