Meta’s Muse Spark Open Scores 39, Leads U.S. Open-Weight Models

Meta’s Muse Spark Open model scored 39 on the Intelligence Index, putting it ahead of NVIDIA’s Nemotron 3.5 Super VL among U.S. open-weight models while leaving three Chinese models ahead or level globally. Xiaomi’s MiMo-V2.6-Pro scored 46, Zhipu’s GLM-5.3 scored 45 and DeepSeek’s V4.1 Flash tied Muse Spark Open at 39. NVIDIA’s model scored 26, giving Meta’s model a 13-point lead over its U.S. competitor. Results varied across test types. Among the nine highest-scoring open-weight models, Muse Spark Open ranked last across four agent tests. It ranked fourth across the other six tests. The entire six-point gap between Muse Spark Open and GLM-5.3 came from the agent tests. Muse Spark Open scored 25 on the AA-Omniscience knowledge-accuracy test, the highest result among open-weight models.

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