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Muse Spark Open releases 816B-parameter weights with a 1M-token context window

research.meta.ai 3 min read Editor score 8/10

Meta says the multimodal model has 816B total parameters, 42B active parameters and a 1M-token context window, with weights and support across several inference engines and hardware platforms. The release gives engineers a substantial open-weight model to evaluate and deploy.

What

Muse Spark Open is an open-weight multimodal model with 816B total parameters, 42B active parameters, and a 1M-token context window.

How

It is designed to run across two M5 Ultra Mac Studios with MLX and is supported by multiple inference engines and hardware platforms.

Why it matters

The release gives engineers options to run and customize a large model on-device or through API platforms.

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