# GPT-6 Luna

> GPT-6 Luna on LegalForecastBench: micro Brier 0.1637 across 387 units.

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

- Provider: OpenAI
- Reasoning: High
- Public release: 2026-09-22
- Training cutoff: May 18, 2026 (knowledge cutoff)
- Eligibility: eligible. The reported knowledge cutoff (May 18, 2026) predates the first scored decision on June 30, 2026.
- Micro Brier: 0.1637
- Equal-case Brier: 0.1738
- Accuracy: 76.5% (296 of 387)
- High-confidence predictions: 183, of which 19 were wrong

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