Meta announces Muse Spark Open multimodal AI model with Apple collaboration

What happened

On 15 October 2026, Meta announced the release of Muse Spark Open, which the company describes as the most capable open-weight model in the United States to date [2]. An open-weight model is an artificial intelligence system where the underlying mathematical values, called weights, are made available for others to use and study [1].

This new model is a natively multimodal mixture-of-experts model, meaning it can process different types of data like text and images simultaneously [1, 2]. It contains a total of 816 billion parameters, which are the internal variables the model uses to make decisions [2]. Meta states the model is designed to perform well at multi-step reasoning, complex software engineering, and long-horizon tasks [2].

Meta and Apple have collaborated for several months to ensure the model runs efficiently on desktop hardware [2]. Meta CEO Mark Zuckerberg stated on X that the model’s weights are being released today and that it runs well on new Mac Studios [2]. Apple CEO John Ternus congratulated the team, noting the model’s scale can run efficiently from a desk on Mac Studio hardware [2]. Meta’s chief AI officer, Alexandr Wang, told Axios that the two companies have been collaborating for several months [2].

Technical details regarding the model include:

• The model can run on a desktop using two Apple M5 Ultra Mac Studios [2].
• It utilizes the latest MLX framework, which is an array framework designed for machine learning tasks on Apple Silicon [2].
• Apple published a technical post covering MLX, Muse Spark Open, and two other open models [2].

Who is affected

Users of Apple hardware can run the model locally on specific setups, such as two M5 Ultra Mac Studios [2]. Developers and businesses can access the model through Amazon SageMaker JumpStart [3]. The model is also available via Hugging Face [1].

What to do next

Users can access Muse Spark Open through Amazon SageMaker JumpStart [3].