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Claude Sonnet 5.5 (Medium, Default Fallback)
Anthropic · Released 2026-09-28 · Independent benchmark scores from Artificial Analysis
Intelligence Index
40.8
Output speed
93.0
tokens/sec
Blended price
$4.00
per 1M tokens
Time to first token
0.82s
Model metadata
| Model ID | 042e8a37-fcd0-40f4-8f41-99215fb68eda |
|---|---|
| Slug | claude-sonnet-5-5-medium |
| Release date | 2026-09-28 |
| Provider | Anthropic |
| Provider slug | anthropic |
| Output speed | 93.0 tok/s |
| Time to first token | 0.82s |
| Time to first answer | 0.82s |
| Blended price ($/1M) | $4.00 |
| Input price ($/1M) | $2.00 |
| Output price ($/1M) | $10.00 |
All evaluation scores (18)
| aime | — |
|---|---|
| aime 25 | — |
| artificial analysis coding index | — |
| artificial analysis intelligence index | 40.80 |
| artificial analysis math index | — |
| gpqa | — |
| hle | 39.8% |
| ifbench | — |
| lcr | 76.3% |
| livecodebench | — |
| math 500 | — |
| mmlu pro | — |
| scicode | 52.9% |
| tau banking | — |
| tau2 | — |
| terminalbench hard | — |
| terminalbench v2 1 | — |
| terminalbench v4 0 | 29.8% |
Source: artificialanalysis.ai/models/claude-sonnet-5-5-medium
Benchmark data from Artificial Analysis.