Elyse Betters Picaro / ZDNETAI systems require a lot of energy to function, but no one has exact numbers, especially not for individual chatbot queries. To address this, an engineer at Hugging Face built a tool to try to find out.Also: The top 20 AI tools of 2025 – and the #1 thing to remember when you use themThe language surrounding AI infrastructure, much of which emphasizes “the cloud” and other air-themed metaphors, can obscure the fact that it relies on energy-hungry computers. To run complex computations quickly, AI systems require powerful chips, multiple GPUs, and expansive data centers, all of which consume power when you ask ChatGPT a question. This is part of why free-tier access to many chatbots comes with usage limits: electricity costs make computing expensive for the hosting company. Chat UI EnergyTo demystify some of this, Hugging Face engineer Julien Delavande built an AI chat interface that shows real-time energy use estimates for your conversations. It compares how much energy various models, tasks, and requests use — for example, a prompt that requires reasoning is likely to use more energy than a simple fact-finding query. In addition to Watt-hours and Joules, the tool shows usage in more accessible metrics, such as the percentage of a phone charge or driving time, using data from the Environmental Protection Agency (EPA). More