AI

Meta's Muse Double Play: Open 816B Model, Closed Frontier Bet

📅 Oct 18, 2026

✍️ Aamir Raza

Meta Goes Open and Closed at Once

Muse Spark Open gives away 816 billion parameters. Muse Wonder stays locked up.

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816B Params, Free to Download

Spark Open is the biggest US open-weight model yet, built for coding and agents. A million-token context window comes standard.

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Two Macs, One Frontier Model

Meta and Apple tuned it to run across two M5 Ultra Mac Studios linked by Thunderbolt — no cloud data center needed.

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The Fine Print: Built With Muse

Products must credit Muse, and businesses over $20M a month in revenue need a separate deal. One analyst calls it a strategic risk.

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Closing the Gap With China

Researcher Nathan Lambert says the US-China open-model gap just shrank by about half — and Wonder ranks near the top tier.

LexxWire

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