OpenAIclosed weightsReasoning
GPT-5.6 Luna
Jun 26, 2026
$0.2 / $1.2
$0.45
1.05M
Benchmark scores
| Benchmark | Score | Δ vs prior | Rank (current) | Configuration | Source |
|---|---|---|---|---|---|
Terminal-Bench 2.1 | 79% | #7 of 21 | leaderboard | benchlm.ai ↗ | |
GPQA Diamond | 92.3% | #5 of 11 | leaderboard | benchlm.ai ↗ | |
ARC-AGI-2 | 59.5% | #9 of 10 | leaderboard | benchlm.ai ↗ | |
Artificial Analysis Intelligence Index | 51.2 | #2 of 11 | leaderboard | benchlm.ai ↗ |