Meta teased 816B-param open-weight Muse Spark Open with 1M context, says meme thread
alexandr_wang · x · 2026-10-16
Scale AI founder and Meta chief AI officer Alexandr Wang amplified a viral meme thread claiming Meta is returning to open weights with Muse Spark Open: 816B total parameters, 42B active, 1M-token context, built for coding and long agent tasks, runnable on two Mac Studios, and billed as the most capable US open-weight model ever. The thread frames it as Meta's response to Llama 4's disappointment. Details are unconfirmed.
Related event: Rumor: Meta to Open-Source 816B-Parameter Muse Spark Open(2 posts)→
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