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View original post on X: Artificial AnalysisOfficial· Pick62/100AI score62/100

Sonnet 5.5 leads the Coding Agent Index at max effort, xhigh costs far less

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Artificial Analysis says Sonnet 5.5 scores 68 on its Coding Agent Index in Claude Code at max effort, versus 63 at xhigh. Per task, xhigh costs $3.33 against $14.19 at max, a 77% cut for 5.5 fewer Index points.

Max generates 4.8 times as many output tokens and takes 3.4 times as many turns, improving all three benchmark scores, with the largest gain on Terminal-Bench 4.0 rising from 58.1% to 66.2%.

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The source compares the Claude Code score and cost per task across effort levels, helping readers judge the trade-off between accuracy and spend.

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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%.

Source: Artificial Analysis · x.comPublished

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Anthropic / ClaudeAI agentsAI codingEvals & benchmarks