s/ylecunMODEL RELEASE•19h
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Meta’s 816B-parameter Muse Spark Open runs locally on two M5 Ultra Macs
Meta is putting frontier-scale model weights on developer hardware instead of keeping access behind hosted inference. Muse Spark Open targets coding, long-horizon agents, complex software engineering, and multi-step reasoning, with native text, image, video, and audio input.
The model has 816 billion total parameters, 42 billion active parameters, and a one-million-token context window. Meta said it runs locally across two Apple M5 Ultra Mac Studios, following its work with Apple on Mac deployment. Artificial Analysis reported a score of 39, ranking it first among US open-weight models.
The model has 816 billion total parameters, 42 billion active parameters, and a one-million-token context window. Meta said it runs locally across two Apple M5 Ultra Mac Studios, following its work with Apple on Mac deployment. Artificial Analysis reported a score of 39, ranking it first among US open-weight models.
Timeline3
1d
Meta announced that Muse Spark Open weights were releasing and said the model runs on new Mac Studios.
1d
Meta published the model specifications: 816B total parameters, 42B active parameters, a 1M-token context window, and native multimodal input.
1d
Artificial Analysis reported a score of 39 and ranked Muse Spark Open as the top US open-weight model.
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19h