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Meta Releases Muse Spark Open, an 816B Open-Weight Model Tuned with Apple

Oct 16, 2026
The Rundown AI
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Summary

Meta releases Muse Spark Open, an open-weight 816B-parameter multimodal model it says is the most capable from the U.S., tuned with Apple to run locally on two M5 Ultra Mac Studios with 1TB combined memory. It scores 39 on Artificial Analysis' Intelligence Index, behind China's GLM 5.3 at 45.

Key Points

  • Meta says Spark Open runs locally through Apple's updated MLX toolkit.
  • Meta says the model edited video in DaVinci Resolve without the cloud.
  • Mistral's 1T-parameter Le Chonk weights arrive Oct. 27.

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