Meta today announced the release of Muse Spark Open, which it says is the "most capable U.S. open-weight model to date." Meta worked with Apple to bring Muse Spark Open to the Mac, and the model can run on a desktop setup with two 512GB Apple M5 Ultra Mac Studios running the latest MLX framework. Meta CEO Mark Zuckerberg thanked Apple CEO John Ternus for working with Meta . @finkd Congrats to the team! Amazing to run a model of Muse Spark Open's caliber and scale this efficiently, right from your desk. Mac Studio keeps pushing the boundaries of on-device AI!
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.
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