Meta releases open-weight Muse Glimmer model, keeps Muse Spark closed

The new model runs on a single consumer graphics card, while Meta's most advanced system stays behind an API On August 10, 2026, Meta Platforms released Muse Glimmer, an AI model that developers can download, modify and run on their own hardware. The company’s most capable system, Muse Spark , stays closed and is available only through an API or paid access. Muse Glimmer has approximately 30 billion parameters. Parameters are the internal settings a model learns during training. More of them usually means more capability, along with heavier hardware demands. The headline feature is where Glimmer runs. Meta says it works locally on consumer machines, such as a Mac or a PC with a single graphics card.

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