Gemini: 0.26 mL for a median query, the only measurement made in production to have been published (Google, 2025), cooling only. Mistral: 45 mL per response of 400 tokens, but from a full life cycle assessment that includes electricity and server manufacturing, so the two figures cannot be compared like for like. Claude: Anthropic has published no water figure per query to date.
Read the source article: How much water does ChatGPT use? A few drops per query