GoKawiilMeta's 816B-parameter Muse Spark Open model targets dual M5 Ultra Mac Studios
Meta released Muse Spark Open, an open-weight model with 816 billion total parameters, 42 billion active parameters, and a 1 million-token context window, designed for coding and multi-step agentic tasks. The model is optimized to run locally across two Mac Studios equipped with 512GB M5 Ultra chips using Apple's MLX framework, which Meta calls the best desktop setup for running a powerful model. Apple has not yet released the 512GB Mac Studio, though it is expected later this month.
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Running an 816-billion-parameter model locally without cloud infrastructure could appeal to developers and enterprises wary of sending code or data to external servers, though the hardware cost—likely well above $20,000 for two high-memory Mac Studios—limits this to well-funded users. The partnership suggests Meta is positioning Apple's unified memory architecture as a viable alternative to traditional GPU clusters for large-model inference, which could influence how future open-weight models are designed around consumer-grade hardware limits.
- Muse Spark Open has 816B total parameters, 42B active, and a 1M-token context window built for coding and agentic tasks.
- It requires two Mac Studios with 512GB M5 Ultra chips to run locally, combining for roughly a terabyte of unified memory.
- The 512GB Mac Studio isn't yet released and will likely be expensive, as the current 256GB model already costs over $10,000.
Apple Mac Studio M5 Ultra — This is the exact machine Meta tuned Muse Spark Open for, leveraging unified memory and massive bandwidth to run huge open-weight models locally. If you want to experiment with cutting-edge local AI workloads without relying on the cloud, the Mac Studio is the hardware built for it.
See Apple Mac Studio M5 Ultra on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: apple.slashdot.org, 2026-10-15
Published there as: “Meta and Apple Bring Muse Spark Open AI Model to Mac Studio”
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