Meta launches new Muse Spark Open model, optimized to run on Mac Studio

Meta has unveiled Muse Spark Open, touting it as the "most capable US open-weight model to date." Apt for Apple users, this model is optimized to operate seamlessly on Mac Studio, powered by M5 Ultra. In a blog post, Meta explains that Muse Spark Open brings "leading agentic capabilities to your desktop for the first time." The model comes with 816B total parameters (42B active) and a 1M-token context window, making it suitable for long-horizon tasks, complex software engineering, and multi-step reasoning.

Muse Spark Open is built for coding and agentic work, leveraging Apple's MLX, an open-source array framework optimized for Apple silicon's unified memory architecture. The combination of MLX and M5 Ultra in Mac Studio allows the model to behave like a supercomputer with a terabyte of unified memory across two machines. The model's performance was tested in various agentic workflows, including shipping real iOS changes to Ice Cubes and driving DaVinci Resolve end to end.

Muse Spark Open is now available on Hugging Face, with Apple publishing a new article on its Machine Learning Research website highlighting the benefits of MLX on Mac for AI researchers and developers.