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    How much energy does a single chatbot prompt use? This AI tool can show you

    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

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    Happy birthday, Apple Watch: 10 best features that changed how we track our health

    Kerry Wan/ZDNETIn 2015, Jony Ive, Apple’s then-industrial designer, introduced the Apple Watch and explained the design decisions behind the wearable that would eventually revolutionize health technology. “You can’t determine a boundary between the physical object and the software,” Ive said. Also: Your next Apple Watch could have a feature that transforms healthcareOn the Apple Watch’s 10th birthday, this concept of boundary-less-ness still holds. Eight years after the iPhone’s debut, Apple created a device that blended into the wearer’s life, with technology that tracked steps, maintained connections with friends and family, and even saved a few lives along the way. Sure, the Apple Watch debuted during Fitbit’s reign, but the smartwatch, aided by constant feature innovation and mainstream ubiquity, trumped its competition in the long run.Tim Cook has said that Apple’s greatest contributions will be through its developments in health — and nowhere is this more true than through the Apple Watch. Throughout its 10-year run, the tech giant has churned out lifesaving features around a user’s wrist. In celebration of 10 years of the Apple Watch, here are some of the most impactful features that have come out of the device and revolutionized wearable technology.1. Closing rings More

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    How to move massive files off your iPad – when all the usual ways fail

    alengo/Getty Images I record many hands-on projects for my YouTube channel. Often, one or more stages of a project must be recorded in a single take. That’s because once whatever it is I’m doing is done, it’s done. Take unboxing videos, for example. Some of the items I’m opening come in giant crates. The crates […] More

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    Nvidia’s 70+ projects at ICLR show how raw chip power is central to AI’s acceleration

    Elyse Betters Picaro / ZDNETOne of the most important annual events in the field of artificial intelligence kicks off this week in Singapore: the International Conference on Learning Representations. As usual, chip giant Nvidia had a major presence at the conference, presenting over 70 research papers from its team.Also: Nvidia launches NeMo software tools to help enterprises build custom AI agentsThe papers cover topics ranging from generating music to creating 3D-realistic videos, robot training tasks, and the ability to generate multiple large language models at the push of a button. More