Zuck rekindles open weights Llama drama with Muse Glimmer

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AI AND ML

30-billion parameter LLM, Meta's first in more than a year, signals Meta's return to the open weights arena. Open version of Muse Spark to follow

After seemingly abandoning its open source AI roots this spring, Meta offered enterprises a glimmer of hope on Monday with the launch of its first open weights model in more than a year.

Unveiled on Monday, Muse Glimmer is a 30 billion-parameter LLM distilled from the Social network's larger, and for now proprietary, Muse Spark model.

Glimmer arrives as American tech companies grapple with a crisis over the proliferation of Chinese open weights models and a call for domestically-created alternatives.

Meta built its reputation on the back of open weights model development beginning with the Llama herd back in 2023. But after Llama 4 flopped and the company restructured its AI group, critics questioned CEO Mark Zuckerberg's commitment to open source AI.

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