Claude Sonnet 4.5
Closed
anthropic/claude-sonnet-4.5 is an AI model.
- Publisher
- Anthropic
- Family
- Claude
- Params
- Undisclosed (closed)
- Context
- 1M
- Input
- Output
- Providers
- anthropicaws-bedrockvertex-ai
- License
- Proprietary
- Released
- 29 Sep 2025
- Canonical
- anthropic.com/news/claude-sonnet-4-5
Cite
Notes
Only stored in your browser.
Attribution
- Benchmark scores
- frontiermathAAprime-hubLiveBenchosworld-orgSWE-benchVaultOpenRewardAfterQueryVals AIEQ-Bench
Context
1M
Input
$3
/1M tok
Output
$15
/1M tok
Blended
$6
#430/ 461/1M · 3:1
Speed
0
#115/ 461tok/s
Cache read
$0.30
0.10x input
Cache write
$3.75
1.25x input
Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter
| Reasoning effort | Index | Speed |
|---|---|---|
| Reasoning | 37.4 | 0 t/s |
| Non-reasoning | 29.9 | 0 t/s |
Intelligence Index per reasoning-effort setting, via Artificial Analysis · pricing identical across tiers
Reported on 82 evals across 15 domains - best 87.5% on IDE-Bench · #1 of 14