# Muse Spark 1.3

> Muse Spark 1.3 on LegalForecastBench: micro Brier 0.1812 across 387 units.

Canonical: https://www.legalforecastbench.org/models/muse-spark-1-3/

- Provider: Meta
- Reasoning: High
- Public release: 2026-09-02
- Training cutoff: Not disclosed
- Eligibility: qualified. The provider has not published a training or knowledge cutoff. Meta has not published a cutoff.
- Micro Brier: 0.1812
- Equal-case Brier: 0.1784
- Accuracy: 72.1% (279 of 387)
- High-confidence predictions: 135, of which 15 were wrong

Ranked comparison: https://www.legalforecastbench.org/#leaderboard