Meta unveils Muse Spark Open: 816B-param open-weight model with 1M context
ai · x · 2026-10-16
Meta Chief AI Officer Alexandr Wang announced muse spark open, billed as the most capable US open-weight model to date: an 816B total / 42B active parameter MoE with 1M-token context and native multimodality.
It targets coding and agentic work such as long-horizon tasks, hard software engineering, and multi-step reasoning. Commenters noted Meta's strategic angle: unlike the labs, Meta doesn't need to sell intelligence—it just needs to make it useful to billions.
Related event: Meta Open-Sources Muse Spark Open, an 816B-Parameter Flagship Model(63 posts)→
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