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Meta publishes the weights for Muse Spark Open

Meta released Muse Spark Open, an open-weights model that runs on two paired Mac desktops, with a score of 39 on the Artificial Analysis Intelligence Index.

  • Compute & infrastructure
  • Application layer
A model interface open on a laptop screen
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01What happened

The weights can be downloaded from Hugging Face and other platforms, or called through hosted services including Baseten, Groq and Together AI.

The model can run inside a private network without sending data to an external API; the published setup is two M5 Ultra Mac Studios running MLX.

Meta calls it the most capable open-weights model from the US.

02By the numbers

2
Mac desktops needed to run it
39
Artificial Analysis Intelligence Index score

03Background

On the same Artificial Analysis index, MiMo-V2.6-Pro scored 46, GLM-5.3 scored 45 and Kimi K3 scored 44 — all above it.

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