Meta releases open-weight Muse Glimmer (30B) and Muse Code terminal agent

Meta released Muse Glimmer, a 30-billion-parameter open-weight model licensed under Apache 2.0 that runs locally on a single-GPU Mac or PC (reportedly usable in ~18GB RAM) and outperforms Gemma 4 31B and Qwen3.6 27B on agentic and coding tasks. It landed to strong enthusiasm on r/LocalLLaMA, where a top thread called it the 'most powerful agentic model' runnable locally under a permissive license — a notable framing given Meta's recent reputation for retreating from open source.

Alongside it, Meta launched Muse Code in beta, a terminal coding agent powered by Muse Spark 1.2 aimed at large-repo software engineering — Meta's answer to Claude Code and DeepSeek's new Harness.

The open-weight, Apache-2.0 posture is strategically interesting because it partially reverses Meta's 2025 pullback from open source. Atlantic CEO Nicholas Thompson's widely-shared LinkedIn analysis (328 likes) argued Meta's apparent yo-yoing makes sense: Meta doesn't need to lead the frontier, only to have 'good enough' AI for its products while keeping competition among everyone else tight — open weights commoditize rivals' advantages.

The darker subplot: Meta is unwinding its ~$2 billion Manus AI acquisition after Beijing blocked the deal on national-security grounds, a reminder that geopolitics is now shaping AI M&A directly. That is a separate development from the Muse releases but underscores Meta's turbulent AI year. Watch whether Muse Glimmer's local-inference strength translates into Hub download share against Qwen and Gemma, and whether Muse Code gains developer traction.