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

MarkTechPostOctober 16, 2026en

MarkTechPost

AI Global Wire

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 appeared first on MarkTechPost .

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