Meta releases Muse Spark Open, an 816B-parameter MoE model with 1M-token context

dl_weekly · x · 2026-10-24

Per dlweekly's newsletter, Meta has released Muse Spark Open, a mixture-of-experts model with 816 billion total parameters (42 billion active) and a 1M-token context window, scoring 39 on the Artificial Analysis Intelligence Index.

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