Model
Muse Spark Open
Muse Spark Open is an open-weight model from Meta, released October 15, 2026. It ranks #38 of 49 models on the Vals Index with 46.61%. Its best result is #3 of 79 on Finance Agent (v2).
Release Date: Oct 15, 2026
Developer
Meta 🇺🇸
Context Window
1M
Max Output Tokens
131k
Token Costs (in/out)
$1.25/4.25
Weights
Open
Input Modalities
Accuracy
46.61 % ± 1.20
Cost / Test (Vals Index)
$
4.077
Latency
67 min 40 s
BenchmarksAccuracyRankings
Proprietary BenchmarksAcademic BenchmarksIndustry Partners