Meta Releases Muse Spark Open: 816B Open-Weight MoE With 1M Context

Meta released Muse Spark Open, an 816B-parameter open-weight mixture-of-experts model with 42B active parameters and a 1M-token context window. The model leads open models on MCP-Atlas and runs on 2 M5 Ultra Mac Studios, according to MarkTechPost.

Meta released Muse Spark Open, an 816B-parameter open-weight MoE model with 42B active parameters and a 1M-token context. It leads open models on MCP-Atlas and runs on 2 M5 Ultra Mac Studios. The post Meta Releases Muse Spark Open: 816B Open-Weight MoE With 1M Context https://www.marktechpost.com/2026/10/15/meta-muse-spark-open-816b-open-weight-model/ appeared first on MarkTechPost https://www.marktechpost.com .