Meta’s Muse Spark Open (Max) tops US open models in Code Arena WebDev
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Meta Superintelligence Labs released an 816 billion parameter open-weight model that runs on two Mac Studios and scored 1511 points on Arena's web development leaderboard.
Key facts
- Meta Superintelligence Labs released an 816 billion parameter open-weight model that runs on two Mac Studios and scored 1511 points on Arena's web development leaderboard
- Meta Superintelligence Labs introduced Muse Spark Open on October 15, 2026
- The 1511 score in Code Arena: WebDev is the number Meta’s fans will quote
- Join 34,000+ readers across crypto, finance, and policy
Summary
Meta has an open-weight model back near the top of a leaderboard. That qualifier, “US,” is doing a lot of work. Meta Superintelligence Labs introduced Muse Spark Open on October 15, 2026. That gap comes from its Mixture-of-Experts design, or MoE.