Dyson's $499 toothbrush has a camera and an AI gap-hunter

Six years of R&D went into a toothbrush. The Dyson CameraJet, announced 1 September, buries a 100,000-pixel macro camera in the brush head and runs an on-device model called Gap Optical Targeting across 28 live frames per second of the inside of your mouth. Within 100 milliseconds of identifying a gap between two teeth, it fires a conical burst of mouthrinse at it — flossing while you brush. The model was trained on roughly 470,000 images of teeth.

The hardware around it is very Dyson: a 12.5 ml rinse reservoir, a dock that refills it in about three seconds, and a MyDyson app that streams the camera feed and builds coverage maps of where you actually brushed. Dyson says inference happens entirely on-device and images are never stored or shared. It ships 8 September at $499, bundled with Dyson-branded toothpaste and mouthrinse — the razor-and-blades model, arriving in your bathroom.

The real story isn't oral hygiene. It's that a real-time vision model small enough to run on a battery-powered handheld is now cheap enough to justify wrapping a $499 consumer appliance around it. Two years ago this needed a phone tethered to a server.

Why it matters: edge AI has crossed from spec-sheet novelty into the thing a company builds a whole product category on.