OpenAIclosed weightsReasoning
GPT-5.6 Terra
Jun 26, 2026
$2 / $12
$4.5
1.05M
Benchmark scores
| Benchmark | Score | Δ vs prior | Rank (current) | Configuration | Source |
|---|---|---|---|---|---|
Terminal-Bench 2.1 | 77.5% | #8 of 21 | leaderboard | benchlm.ai ↗ | |
GPQA Diamond | 92.9% | #4 of 11 | leaderboard | benchlm.ai ↗ | |
ARC-AGI-2 | 83.9% | #6 of 10 | leaderboard | benchlm.ai ↗ | |
τ²-bench (Telecom) | 86.3% | #6 of 10 | leaderboard | benchlm.ai ↗ | |
Artificial Analysis Intelligence Index | 55 | #2 of 11 | leaderboard | benchlm.ai ↗ |