Artificial Analysis 发布编码 Agent 评测，Anthropic 的 Sonnet 5.5 在 Claude Code 中以 max 档 68 分登顶 Coding Agent Index，xhigh 档 63 分但每任务成本仅 $3.33 对 $14.19，降低 77% 成本。
原文给出 Sonnet 5.5 不同 effort 档位的具体分数与每任务成本，为编码 Agent 选型提供了可量化的性价比参考。
Sonnet 5.5 tops the Coding Agent Index at max effort, while xhigh offers an attractive cost-performance trade-off: 63 points versus 68 for less than a quarter of the cost
In Claude Code, @AnthropicAI’s Sonnet 5.5 scores 68 at max versus 63 at xhigh. At $14.19 versus $3.33 per task, choosing xhigh cuts cost by 77% for 5.5 fewer Index points.
Max generates 4.8× as many output tokens and takes 3.4× as many turns. It improves all three benchmark scores, with the largest gain on Terminal-Bench 4.0: 58.1% → 66.2%.
来源：Artificial Analysis · x.com