Meta releases Muse Spark Open 816B-A42B weights on Hugging Face
mishig25 · x · 2026-10-16
Meta has dropped the Muse Spark Open weights (816B total parameters, 42B active) on Hugging Face.
Config details show support for tiered reasoningeffort (low/medium/high/xhigh mapping to different thinking budgets), tool calling, multimodal inputs (image/video/audio placeholders), a January 2026 knowledge cutoff, and template-level escaping of special tokens and media placeholders to prevent injection.
Related event: Meta Open-Sources Muse Spark Open, an 816B-Parameter Frontier Model(45 posts)→
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