Anthropicclosed weightsReasoning
Claude Sonnet 4.5
Retires no sooner than Sep 29, 2026.
Sep 29, 2025
$3 / $15
$6
200K
Benchmark scores
| Benchmark | Score | Δ vs prior | Rank (current) | Configuration | Source |
|---|---|---|---|---|---|
SWE-bench Verified | 77.2% | #5 of 9 | leaderboard | benchlm.ai ↗ | |
ARC-AGI-2 | 13.6% | #10 of 10 | thinking · leaderboard | benchlm.ai ↗ |