Meta open-sources Muse Spark, first base model from its new MSL org
RylanSchaeffer · x · 2026-10-16
Jack Rae announced that Muse Spark, the first base model trained under Meta's new MSL org, is being open-sourced today. The open-weight version received extensive additional training for release and is described as efficient and capable. Rylan Schaeffer predicts Meta will flood the market with high-quality open models and cheap tokens, making him bullish on MSL and upcoming releases.
Related event: Meta Open-Sources Muse Spark Open with 816B Parameters and 1M Context(39 posts)→
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