--- title: "claude-code \u00b7 Opus 5.5 | Pelican benchmark" url: https://evaljetty.com/pelicans/runs/agents/v2-claude-opus55.html description: "claude-code \u00b7 Opus 5.5 (anthropic/claude-opus-5.5) drawing a pelican riding a bicycle: every hill-climb run with self-scores, external judge scores and Jetty trajectories." updated: 2026-09-28 publisher: Jetty (https://jetty.io) --- 02 — Runs · v2 · jettygrowthteam · auto-evolved runbook (weakest-axis targeting) # claude-code anthropic/claude-opus-5.5 claude-code driving anthropic/claude-opus-5.5 through OpenRouter, 5 hill-climb rounds from the v1 runbook. Judge, best round 32.8/40 round v3 (agent's pick) Self-score 36/40 inflation +3.2 Runs 5 $4.55 metered ![claude-code · Opus 5.5 best round](https://evaljetty.com/pelicans/img/v2-claude-opus55/v3.svg) best round v3 · 35c47f4e ### Self-score vs judge, by axis Best round v3, 0–10 per axis agent self-scoreexternal judge **Judge:** A clearly readable white pelican with a large orange throat pouch, crest and eye. It sits on the saddle, its feet reach the pedals and its dark wingtips grip the handlebars. The bicycle is well formed, with spoked wheels, a chainring and a chain, but the frame geometry is slightly odd: the seat tube meets the chainring off-center and the fork is thin. There are minor issues too: the legs are stiff and awkwardly jointed, the body overlaps the saddle, and the pouch sits oddly detached from the upper beak. ### Score by round Out of 40. Each round starts from the previous round's best SVG. Dashed line: the 28/40 pass threshold. self-scorejudgepass ≥ 28 ## 5 drawings, *oldest first.* Click a drawing to open it in the head-to-head viewer. The outlined card is the agent's best round. Verdicts are derived (code checks on the stored SVG and judge ≥ 28/40); see [Runs](https://evaljetty.com/pelicans/runs/index.html#all-runs). [![claude-code · Opus 5.5 round v1](https://evaljetty.com/pelicans/img/v2-claude-opus55/v1.svg)](https://evaljetty.com/pelicans/investigations/best-pelican.html#v2-claude-opus55/v1) **v1** passjudge **32.7** · self 35 5361e30a[runbook](https://evaljetty.com/pelicans/author/versions.html#v2-claude-opus55/v1) [![claude-code · Opus 5.5 round v2](https://evaljetty.com/pelicans/img/v2-claude-opus55/v2.svg)](https://evaljetty.com/pelicans/investigations/best-pelican.html#v2-claude-opus55/v2) **v2** passjudge **33** · self 35 ba932f3e[runbook](https://evaljetty.com/pelicans/author/versions.html#v2-claude-opus55/v2) [![claude-code · Opus 5.5 round v3](https://evaljetty.com/pelicans/img/v2-claude-opus55/v3.svg)](https://evaljetty.com/pelicans/investigations/best-pelican.html#v2-claude-opus55/v3) **v3** · best passjudge **32.8** · self 36 35c47f4e[runbook](https://evaljetty.com/pelicans/author/versions.html#v2-claude-opus55/v3) [![claude-code · Opus 5.5 round v4](https://evaljetty.com/pelicans/img/v2-claude-opus55/v4.svg)](https://evaljetty.com/pelicans/investigations/best-pelican.html#v2-claude-opus55/v4) **v4** passjudge **33** · self 36 2e046a89[runbook](https://evaljetty.com/pelicans/author/versions.html#v2-claude-opus55/v4) [![claude-code · Opus 5.5 round v5](https://evaljetty.com/pelicans/img/v2-claude-opus55/v5.svg)](https://evaljetty.com/pelicans/investigations/best-pelican.html#v2-claude-opus55/v5) **v5** passjudge **33.3** · self 35 0e41c0a0[runbook](https://evaljetty.com/pelicans/author/versions.html#v2-claude-opus55/v5) ### Scores per round | Round | Pelican | Bicycle | Composition | Polish | Self total | Judge total | Verdict | Judge spread | Cost | Minutes | Trajectory | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | v1 | 8.5self 9 | 7.7self 9 | 8.5self 9 | 8self 8 | 35 | 32.7 | pass | 0.5 | $0.87 | 4.3 | 5361e30a | | v2 | 8.5self 9 | 8self 9 | 8.5self 8 | 8self 9 | 35 | 33 | pass | 0 | $0.88 | 4.6 | ba932f3e | | v3 | 8.5self 9 | 8self 9 | 8.3self 10 | 8self 8 | 36 | 32.8 | pass | 0.5 | $0.83 | 4.8 | 35c47f4e | | v4 | 8.5self 9 | 8self 9 | 8.5self 9 | 8self 9 | 36 | 33 | pass | 0 | $0.87 | 4.5 | 2e046a89 | | v5 | 8.5self 9 | 8self 9 | 8.5self 8 | 8.3self 9 | 35 | 33.3 | pass | 0.5 | $1.10 | 6.4 | 0e41c0a0 | --- Source: https://evaljetty.com/pelicans/runs/agents/v2-claude-opus55.html · Evals by Jetty · Run your own evals: https://jetty.io/?utm_source=evaljetty&utm_medium=llms