Meta Releases Muse Spark Open, an Over 800 Billion Parameter Model That Can Run Locally on Multiple M5 Ultra Mac Studios

MacStories
By John VoorheesOct 15, 2026, 1:10 pm167 ptsTrending
Meta just released the weights for Muse Spark Open, a multimodal large language model with a mixture-of-experts architecture. It has over 800 billion parameters in total, with 40 billion active per token, and it can run on the latest Mac Studios. Meta worked closely with Apple to make that happen specifically…

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