Meta Unveils Massive Open-weight AI Model Requiring 1TB RAM
WHO:
Techmeme - Meta is the organization releasing the AI model.
Engadget - Meta is identified as the company behind the Muse Spark Open model.
WHAT:
Fast Company - Muse Spark Open is publicly available for anyone to run on their own hardware, rather than being offered solely as a cloud service.
Fast Company - The setup for running Muse Spark Open on two Mac Studios requires a total of 1 TB of RAM between the computers, costing tens of thousands of dollars.
MarkTechPost - Muse Spark Open is described as an "816B-parameter open-weight MoE model" and is noted to lead open models on MCP-Atlas.
MarkTechPost - Muse Spark Open runs on 2 M5 Ultra Mac Studios.
TechCrunch - Meta and Apple have teamed up for the launch of Muse Spark Open, which will run locally on Apple silicon.
Techmeme - Meta released Muse Spark Open, described as the most capable US open-weight model.
Techmeme - The model has a total of 816 billion parameters and 42 billion active parameters.
Engadget - Muse Spark Open is characterized as "the most capable US open-weight model to date."
Techmeme - The model features a 1 million-token context window.
Techmeme - Muse Spark Open is available for use on Apple M5 Ultra Mac Studios.
WHERE:
Techmeme - Muse Spark Open is available for desktop use, specifically on Apple M5 Ultra Mac Studios.
HOW:
Fast Company - Apple has created a software technology called MLX to optimize its computers for running machine learning software, including LLMs.
Techmeme - The model requires 1 terabyte of RAM to run effectively.
(UPDATED October 16, 2026 15:58 UTC)
Muse Spark Open is now available for public use, allowing anyone to run it on their own hardware instead of relying solely on cloud services. However, setting up Muse Spark Open on two Mac Studios requires a hefty investment, needing a total of 1 TB of RAM between the computers, which can cost tens of thousands of dollars. To facilitate this, Apple has developed a software technology called MLX, designed to optimize its computers for running machine learning software, including large language models.
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(UPDATED October 16, 2026 04:00 UTC)
Muse Spark Open has been introduced as an "816B-parameter open-weight MoE model," and it currently leads open models on MCP-Atlas. This innovative model operates on two M5 Ultra Mac Studios, showcasing its advanced capabilities. The announcement highlights a significant advancement in the field of machine learning technology.
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(UPDATED October 15, 2026 21:02 UTC)
Meta and Apple have announced a collaboration to launch Muse Spark Open, a new project that will operate locally on Apple silicon. This partnership marks a significant step in the tech industry as both companies combine their strengths. The launch is expected to enhance user experience and performance for those utilizing Apple’s hardware.
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(UPDATED October 15, 2026 18:01 UTC)
Meta has just released Muse Spark Open, touted as the most capable US open-weight model to date, featuring a staggering 816 billion parameters and a one million-token context window. This powerful model is designed for desktop use on Apple M5 Ultra Mac Studios and requires a hefty one terabyte of RAM to operate effectively. With 42 billion active parameters, Muse Spark Open is set to make a significant impact in the AI landscape.