Claude Sonnet 5.5 vs GPT-6 Astra
Claude Sonnet 5.5 and GPT-6 Astra side by side on shared benchmark boards, Codex Radar runs and the lowest real price per million tokens.
| Best score per board | Claude Sonnet 5.5 | GPT-6 Astra |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Artificial Analysis Intelligence Index v4.3 | 56.0 | 52.7 |
| Terminal-Bench 4.0 | — | 58.2 |
| Terminal-Bench 4.0 (AA) | 63.6 | 59.6 |
| Code Arena | WebDev Overall | 1709.0 | 1789.0 |
| Agent Arena · Overall (Ranking / Pareto) | — | 12.2 |
| Artificial Analysis Coding Agent Index v1.5 | 68.4 | 61.6 |
| OpenDesign Arena · Quality ranking | 86.8 | 82.7 |
| DeepSWE v1.1 | — | 74.1 |
| Radar IQ (Codex) | — | 110.4 |
| Lowest real price / MTok | $0.0027 | $0.052 |
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