Claude Sonnet 5.5
- Publisher
- Anthropic
- Context
- 1M
- Input
- Output
- Released
- 28 Sep 2026
Cite
Notes
Only stored in your browser.
Context
1M
Input
$2
/1M tok
Output
$10
/1M tok
Cache read
$0.10
0.05x input
Cache write
$2.50
1.25x input
Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter
| Reasoning effort | Index | Speed |
|---|---|---|
| max | 54.5 | 140 t/s |
| xhigh | 49.9 | 139 t/s |
| high | 41.5 | 142 t/s |
| medium | 30.8 | 129 t/s |
| low | 25.6 | 137 t/s |
Intelligence Index per reasoning-effort setting, via Artificial Analysis · pricing identical across tiers
Reported on 10 evals across 7 domains - best 100.0% on ProofBench · #1 of 79