Meta to release Muse Spark 1.2 weights after Muse Glimmer

Alex Getman @alexgetmancom · 10 Aug 2026, 10:51 UTC · Updated 31 Oct 2026, 20:59 UTC

⚡️ Muse Spark 1.2 is going open weight

Meta published a big post outlining its AI strategy and promised to start releasing open models again. Right after that, it released the weights for Muse Glimmer and confirmed that Muse Spark 1.2 is coming next.

Screenshot of Mark Zuckerberg's X.com post announcing the release of weights for Muse Glimmer, a 30B parameter model, and the upcoming release of weights for Muse Spark 1.2, Meta's latest foundation model.

Meta Muse

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Claude Meta Muse

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Claude Meta Muse

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Claude Fable 5 GPT-5.6 Sol Meta Muse

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GPT-5.6 Sol Meta Muse

Muse Spark 1.2 is going open weight

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