# GPT-5.6 Luna

> GPT-5.6 Luna on LegalForecastBench: micro Brier 0.1432 across 387 units.

Canonical: https://www.legalforecastbench.org/models/gpt-5-6-luna/

- Provider: OpenAI
- Reasoning: High
- Public release: 2026-06-26
- Training cutoff: February 16, 2026 (knowledge cutoff)
- Eligibility: eligible. The reported knowledge cutoff (February 16, 2026) predates the first scored decision on June 30, 2026.
- Micro Brier: 0.1432
- Equal-case Brier: 0.1508
- Accuracy: 80.9% (313 of 387)
- High-confidence predictions: 182, of which 20 were wrong

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