Meta released Muse Glimmer, a 30-billion-parameter open-weight model for always-on agents on a Mac or PC with one consumer GPU. Weights ship under Apache 2.0 on Hugging Face, with text and image input, tool calling, and long-horizon workflows meant to stay on-device. Meta frames Glimmer as a distilled local cousin of closed Muse Spark, using quantization and a speculative decoding drafter to fit consumer memory. The release advances Zuckerberg's personal-agent pitch without shipping every personal file to the cloud. Caveat: Muse Spark stays closed, so the open lane is the smaller local model, not Meta's strongest system.