Meta Unveils Muse Spark Open, Its Most Powerful Open-Weight AI Yet
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Meta is bringing one of its largest open-weight AI models to developers who want more control over where and how their AI workloads run.
Announced Oct. 15, Muse Spark Open brings 816 billion total parameters, 42 billion active parameters per token via a mixture-of-experts design, and a 1-million-token context window. Meta declared the release “the most capable US open-weight model to date.”
Meta calls it the most capable US open-weight model to date, but benchmark comparisons suggest that Chinese competitors remain ahead in some areas. For developers, the bigger question is whether the model’s capabilities justify the hardware and deployment costs.
Bridging silicon and desktop compute
Meta engineered the system alongside Apple’s MLX framework so that two Mac...
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