Anthropicclosed weightsReasoning
Claude Opus 4.5
Cut Opus pricing from $15/$75 to $5/$25; first model past 80% on SWE-bench Verified.
Nov 24, 2025
$5 / $25
$10
200K
Benchmark scores
| Benchmark | Score | Δ vs prior | Rank (current) | Configuration | Source |
|---|---|---|---|---|---|
SWE-bench Verified | 80.9% | #2 of 9 | leaderboard | benchlm.ai ↗ | |
Humanity's Last Exam | 30.8% | #12 of 15 | leaderboard | benchlm.ai ↗ | |
ARC-AGI-2 | 37.6% | #10 of 10 | thinking · leaderboard | benchlm.ai ↗ | |
AIME 2026 | 95.1% | #1 of 2 | leaderboard | benchlm.ai ↗ | |
τ²-bench (Telecom) | 89.5% | #5 of 10 | thinking · leaderboard | benchlm.ai ↗ | |
MMLU-Pro | 89.5% | #1 of 4 | leaderboard | benchlm.ai ↗ | |
Artificial Analysis Intelligence Index | 40.8 | #6 of 11 | thinking · leaderboard | benchlm.ai ↗ |