Meta's Muse Spark Open rated best US open-weight model on Signal65 PINNACLE

ryanshrout · x · 2026-10-17

Signal65's evaluation finds Meta's open-weight Muse Spark Open scores 3,367 on PINNACLE, ranking #30 of 82 scored builds and #1 of 16 US open-weight models, fourth among open models worldwide. It makes 57% fewer weighted errors than the next US open model (Meta's Muse-Glimmer-30B) and 69% fewer than Nemotron-3 Ultra. Analyst Daniel Newman concludes Meta now has the best US-based open-weight model.

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