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Muse Spark Open

Muse Spark Open is a natively multimodal mixture-of-experts model from Meta, with 816B total and 42B active parameters and a 1M-token context window

Free Multimodal
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1048576 context tokens
816B total, 42B active parameters
Open weights license
Oct 2026 released

Muse Spark Open is a natively multimodal mixture-of-experts model from Meta, with 816B total and 42B active parameters and a 1M-token context window. It targets coding and agentic work.

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