Meta releases Muse Spark Open: 816B MoE with 42B active, 1M context
minchoi · x · 2026-10-16
Meta officially released Muse Spark Open, billed as the most capable US open-weight model to date, built for coding, agentic work, long-horizon tasks, and multi-step reasoning.
Key specs:
- 816B total / 42B active parameters (MoE)
- 1M token context window
- Natively multimodal across text, image, video, and audio
Related event: Meta Releases Muse Spark Open: 816B-Parameter Open-Weight Model(61 posts)→
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