Meta Announces Open Weights for Muse Spark 1.2 and Glimmer

Alexandr Wang posted the open-weight release of Muse Glimmer, a 30B agentic model under Apache 2.0 license. The announcement also covered the planned open-weight release of Muse Spark 1.2. Multiple researchers and academics on X replied with approval, including Yann LeCun, Graham Neubig, and Sriram Krishnan, highlighting the return of Meta open models. One detailed reply described Muse Glimmer as pretrained on Muse Spark outputs via logit distillation followed by midtraining on long context.