Claude Sonnet 5.5 (High): benchmark results
Provider: Anthropic. Released 2026-09-28. Access: API.
Unified ELO 1938 ± 27, rank #26 of 2059 rated models, from 23 benchmark results.
Strongest benchmark results
| Benchmark | Score | Metric | Percentile |
|---|---|---|---|
| WebDev Arena (HTML) | 1707 | Arena Score | 99.2 |
| Chatbot Arena (Code) | 1699 | Elo | 97.8 |
| WebDev Arena (Frontend) | 1727 | Arena Score | 97.7 |
| WebDev Arena (Gaming) | 1823 | Arena Score | 97.7 |
| WebDev Arena (Reference-Based Design) | 1761 | Arena Score | 97.7 |
| WebDev Arena (Simulations) | 1823 | Arena Score | 97.7 |
| WebDev Arena | 1698.82 | Arena Score | 97.6 |
| WebDev Arena (React) | 1726 | Arena Score | 97.4 |
| WebDev Arena (Consumer Product) | 1621 | Arena Score | 95.5 |
| WebDev Arena (Brand & Marketing) | 1659 | Arena Score | 93.9 |
| WebDev Arena (Data & Analytics) | 1570 | Arena Score | 90.9 |
| CursorBench 4.0 | 47.8 | Score (%) | 88.3 |
Interactive version: theaggregate.ai/model?slug=claude-sonnet-5-5-high · How It Works · Data refreshed daily, snapshot 2026-09-30.