Meta releases Muse Spark Open artificial intelligence model with Mac support

Meta released Muse Spark Open, a new open-weight artificial intelligence model designed for coding, agentic tasks, and multi-step reasoning, on October 15, 2026. TestingCatalog AI News, The Guardian, and Reuters all report that the system is now available. The release follows earlier model launches by Meta Superintelligence Labs, as FTMQ Tech reported earlier. [1][5][6][7][10][11]

The natively multimodal system features 816 billion total parameters with 42 billion active parameters, according to TestingCatalog AI News. The outlet also reported that the model supports a 1 million-token context window. TestingCatalog AI News and The Verge both report that Meta collaborated with Apple to make the system run efficiently on Mac hardware. [1][8][10]

Users can run the model locally across two Apple M5 Ultra Mac Studio machines using the MLX framework, TestingCatalog AI News reports. Each machine provides up to 512 GB of unified memory, which allows the pair to host the full model. However, Martin Cid Magazine reports that the required two-Mac Studio hardware setup is not yet available for purchase. [1][4]

The model is available through direct application programming interfaces and downloadable weights, according to TestingCatalog AI News and ababnews.com. NVIDIA Developer reported that the model can also scale agentic coding workflows on NVIDIA GB300 NVL72 hardware. [1][3][9]