Meta launches an open-weight AI model built for Macs

Meta has launched Muse Spark Open, an AI model designed to run on Macs that the company calls the “most capable” open-weight model in the United States.

The model has 816 billion parameters and a 1 million-token context window. Evaluation results released by Meta on Thursday claim it outperforms other popular open-weight models.

Muse Spark Open is natively multimodal and built for complex coding tasks and agentic workflows. Meta is making it available immediately through multiple API platforms.

The model can run locally on Apple computers but requires at least 1 terabyte of RAM, according to Engadget. It runs best on a Mac Studio equipped with the M5 Ultra chip.

Meta said it paired the model with Muse Code, its AI coding terminal, for several agentic workflows. In one coding workflow involving a Mastodon client, the model made bug fixes, added new features and completed a full build.

The company said it also deployed the model with video editing software DaVinci Resolve, where it was able to review and crop footage.

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