Slashdot: Meta and Apple Bring Muse Spark Open AI Model to Mac Studio

Meta and Apple Bring Muse Spark Open AI Model to Mac Studio
Published on 2026-10-15T19:00:00Z
Meta has released Muse Spark Open, an 816-billion-parameter open-weight model optimized to run locally across two 512GB M5 Ultra Mac Studios using Apple's MLX framework. Meta says it's the "most capable U.S. open-weight model to date." MacRumors reports: Muse Spark Open has 816 billion total parameters with 42 billion active parameters and a 1 million-token context window. It is meant for coding and agentic work, and Meta says it excels at extended tasks, multi-step reasoning, and software engineering. The new Muse model was tuned to run on Mac Studio, and Meta says the Mac Studio paired with Muse Spark Open is the "best way to run a powerful model on your own desktop." From Meta: "Apple's unified memory architecture lets the M5 Ultra's integrated GPU use up to 512 GB per Mac Studio, so two machines can hold an entire model. And the chip's 1.2 TB/s of memory bandwidth is fast enough to read the small slice each token needs. The result is two Mac Studios behave like one supercomputer with a terabyte of unified memory." Apple hasn't released the 512GB Mac Studio as of yet, but it's supposed to be coming later this month. It won't be cheap, because the 256GB Mac Studio is already priced over $10,000.

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