# Claude Opus 5

> Claude Opus 5 on LegalForecastBench: micro Brier 0.1399 across 387 units.

Canonical: https://www.legalforecastbench.org/models/claude-opus-5/

- Provider: Anthropic
- Reasoning: Adaptive thinking (provider default: high)
- Public release: 2026-07-24
- Training cutoff: May 2026 (training-data cutoff)
- Eligibility: eligible. The reported training-data cutoff (May 2026) predates the first scored decision on June 30, 2026.
- Micro Brier: 0.1399
- Equal-case Brier: 0.1355
- Accuracy: 80.1% (310 of 387)
- High-confidence predictions: 121, of which 4 were wrong

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