Claude Opus 5.5 vs Claude Sonnet 4.5
| Claude Opus 5.5 | Claude Sonnet 4.5 | |
|---|---|---|
| Coding index | 88.8 | 39.5 |
| Benchmarks behind it | Verified, 5 benchmarks | Verified, 3 benchmarks |
| Output $/Mtok | $20.00 | $15.00 |
| Cost per solved task | Not computable | $1.16 |
| Context window | 1M | 1M |