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Meta releases Muse Spark Open weights: 816B MoE coding model that runs on two Mac Studios

Meta released open weights for Muse Spark Open on Oct 15, a natively multimodal 816B-total / 42B-active model with 1M context built for coding and agentic work, under the Muse Model License with limited commercial terms. It runs on two M5 Ultra Mac Studios via MLX, on vLLM, SGLang, and llama.cpp, and through hosts like OpenRouter, Together AI, Fireworks, and Groq.

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