Claude Sonnet 5.5
- Made by
- Anthropic
- Weights
- Closed
- Released
- Sep 28, 2026
- Context
- 1M
- Price per 1M tokens
- $2 input, $10 output
| Benchmark | Score | Type | Measured by |
|---|---|---|---|
| Intelligence Index v5.0.1 (max) | 54.5 | Independent | Artificial Analysis |
| Cost per test task | $10.02 | Independent | Artificial Analysis |
| HLE-Diamond | 53.3% | Independent | Artificial Analysis |
| Terminal-Bench 4.0 | 63.6% | Independent | Artificial Analysis |
| FrontierCode 2.0 | 41.7% | Independent | Artificial Analysis |
| CritPt v2 (Hard Subset) | 59% | Independent | Artificial Analysis |
Scores as of Nov 8, 2026. The Intelligence Index is a combined score from 9 tests that compares selected abilities, not overall usefulness. Scores from different test versions are not comparable, and makers sometimes publish different numbers from their own runs.
Sources: artificialanalysis.ai