Macs2 min read
Meta Releases Muse Spark Open, an 816B-Parameter Open-Weight AI Model Built to Run on Macs
Meta has released Muse Spark Open, which it describes as the most capable open-weight AI model in the United States. The model features 816 billion parameters and a 1 million token context window, and Meta said evaluation results published on Thursday show it outperforming other popular open-weight…
By James DarganThe AI Insider

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Originally published by The AI Insider on Oct 16, 2026.
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