Meta releases Muse Glimmer under an Apache 2.0 license

Meta released Muse Glimmer on 10 August 2026, a 30-billion-parameter multimodal model distilled from its closed Muse Spark model and published on Hugging Face under Apache 2.0. Compressed to about 4-bit precision, it runs on a single consumer GPU or Mac under 20GB.

Why it mattered Meta returned to open weights four months after moving its flagship Muse Spark model to closed weights, and used the most permissive license it had applied to an open model.