Meta Drops Muse Spark Open, an 816B Open-Weight Model Rivaling Closed AI Giants

Meta's new 816B parameter mixture-of-experts model targets long-horizon coding and agentic work, with open weights that fit on two Mac Studios.

Source

AI at Meta

Published

Oct 15, 2026, 5:08 PM

Author

AlphaSignal Newsroom

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1 min read

Meta's new 816B parameter mixture-of-experts model targets long-horizon coding and agentic work, with open weights that fit on two Mac Studios.

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