---
title: "claude-code \u00b7 Opus 5.5 | Pelican benchmark"
url: https://evaljetty.com/pelicans/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 round, self-scores and external judge scores."
updated: 2026-09-28
publisher: Jetty (https://jetty.io)
---

v2 · Sep 2026 · jettygrowthteam · auto-evolved runbook (weakest-axis targeting)

# claude-code · Opus 5.5

claude-code driving anthropic/claude-opus-5.5 through OpenRouter, 5 hill-climb rounds from the v1 runbook.

agent **claude-code** · model **anthropic/claude-opus-5.5**

Judge, best round

32.8/40

round v3

Self-score, best round

36/40

inflation +3.2

Rounds

5

~$4.55 est. spend

![claude-code · Opus 5.5 best round](https://evaljetty.com/pelicans/img/v2-claude-opus55/v3.svg)

best round v3 · [35c47f4e ↗](https://jetty.io/jettygrowthteam/pelican-bicycle-svg/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.

self-scorejudge

## Every round

Click a drawing to open it in the head-to-head viewer. The outlined card is the agent's best round.

[![claude-code · Opus 5.5 round v1](https://evaljetty.com/pelicans/img/v2-claude-opus55/v1.svg)](https://evaljetty.com/pelicans/head-to-head.html#v2-claude-opus55/v1)

**v1**judge **32.7** · self 35
[5361e30a ↗](https://jetty.io/jettygrowthteam/pelican-bicycle-svg/5361e30a)[runbook](https://evaljetty.com/pelicans/runbooks.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/head-to-head.html#v2-claude-opus55/v2)

**v2**judge **33** · self 35
[ba932f3e ↗](https://jetty.io/jettygrowthteam/pelican-bicycle-svg/ba932f3e)[runbook](https://evaljetty.com/pelicans/runbooks.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/head-to-head.html#v2-claude-opus55/v3)

**v3** · bestjudge **32.8** · self 36
[35c47f4e ↗](https://jetty.io/jettygrowthteam/pelican-bicycle-svg/35c47f4e)[runbook](https://evaljetty.com/pelicans/runbooks.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/head-to-head.html#v2-claude-opus55/v4)

**v4**judge **33** · self 36
[2e046a89 ↗](https://jetty.io/jettygrowthteam/pelican-bicycle-svg/2e046a89)[runbook](https://evaljetty.com/pelicans/runbooks.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/head-to-head.html#v2-claude-opus55/v5)

**v5**judge **33.3** · self 35
[0e41c0a0 ↗](https://jetty.io/jettygrowthteam/pelican-bicycle-svg/0e41c0a0)[runbook](https://evaljetty.com/pelicans/runbooks.html#v2-claude-opus55/v5)

### Scores per round

| Round | Pelican | Bicycle | Composition | Polish | Self total | Judge total | Judge spread | Minutes | Trajectory |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| v1 | 8.5self 9 | 7.7self 9 | 8.5self 9 | 8self 8 | 35 | 32.7 | 0.5 | 4.3 | [5361e30a ↗](https://jetty.io/jettygrowthteam/pelican-bicycle-svg/5361e30a) |
| v2 | 8.5self 9 | 8self 9 | 8.5self 8 | 8self 9 | 35 | 33 | 0 | 4.6 | [ba932f3e ↗](https://jetty.io/jettygrowthteam/pelican-bicycle-svg/ba932f3e) |
| v3 | 8.5self 9 | 8self 9 | 8.3self 10 | 8self 8 | 36 | 32.8 | 0.5 | 4.8 | [35c47f4e ↗](https://jetty.io/jettygrowthteam/pelican-bicycle-svg/35c47f4e) |
| v4 | 8.5self 9 | 8self 9 | 8.5self 9 | 8self 9 | 36 | 33 | 0 | 4.5 | [2e046a89 ↗](https://jetty.io/jettygrowthteam/pelican-bicycle-svg/2e046a89) |
| v5 | 8.5self 9 | 8self 9 | 8.5self 8 | 8.3self 9 | 35 | 33.3 | 0.5 | 6.4 | [0e41c0a0 ↗](https://jetty.io/jettygrowthteam/pelican-bicycle-svg/0e41c0a0) |

---
Source: https://evaljetty.com/pelicans/agents/v2-claude-opus55.html · Evals by Jetty · Run your own evals: https://jetty.io/?utm_source=evaljetty&utm_medium=llms