Anthropicclosed weightsReasoning
Claude Opus 4.6
First Claude with a 1M context; crossed 1500 Arena Elo.
Feb 5, 2026
$5 / $25
$10
1M
Benchmark scores
| Benchmark | Score | Δ vs prior | Rank (current) | Configuration | Source |
|---|---|---|---|---|---|
SWE-bench Verified | 80.8% | #2 of 9 | leaderboard | benchlm.ai ↗ | |
GPQA Diamond | 89.2% | #8 of 11 | leaderboard | benchlm.ai ↗ | |
Humanity's Last Exam | 53% | #6 of 15 | leaderboard | benchlm.ai ↗ | |
ARC-AGI-2 | 68.8% | #7 of 10 | adaptive · leaderboard | benchlm.ai ↗ | |
τ²-bench (Telecom) | 92.1% | #4 of 10 | adaptive · leaderboard | benchlm.ai ↗ | |
MMLU-Pro | 82% | #4 of 4 | leaderboard | benchlm.ai ↗ | |
Artificial Analysis Intelligence Index | 43.7 | #5 of 11 | adaptive · leaderboard | benchlm.ai ↗ | |
LMArena Text | 1503 | #1 of 5 | high · leaderboard | benchlm.ai ↗ |