GoKawiilMeta releases open-weight Muse Spark Open model built for Mac Studio M5 Ultra
Meta launched Muse Spark Open, a multimodal model with 816 billion total parameters (42 billion active) and a 1 million-token context window, designed for coding and agentic tasks. The model is optimized using Apple's MLX framework to run on Mac Studio with M5 Ultra chips, with Meta demonstrating two linked Mac Studios handling the full model via unified memory. Weights are now available through Hugging Face.
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The release signals growing collaboration between Meta's open-model strategy and Apple's silicon, which could push more developers toward running large AI models locally rather than relying on cloud infrastructure. Meta's demonstrations of agentic coding and video-editing tasks suggest the company sees on-device, high-memory setups as a path toward practical desktop AI agents, though real-world performance and adoption remain to be tested broadly.
- Muse Spark Open has 816B total parameters (42B active) and a 1M-token context window.
- It's optimized for Apple's Mac Studio with M5 Ultra chips using the latest MLX framework.
- Meta demonstrated agentic workflows, including coding an iOS app and editing video, running entirely on-device.
Apple Mac Studio M5 Ultra — If you want to run Meta's new Muse Spark Open model locally, the Mac Studio with M5 Ultra is specifically what it's optimized for thanks to Apple's unified memory architecture and MLX framework. It's a great desktop pick for developers wanting to experiment with cutting-edge agentic AI models at home.
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: 9to5mac.com — Chance Miller, 2026-10-15
Published there as: “Meta launches new Muse Spark Open model, optimized to run on Mac Studio”
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