--- title: "opencode \u00b7 GPT-5.6 Terra | Pelican benchmark" url: https://evaljetty.com/pelicans/runs/agents/v2-opencode-gpt56.html description: "opencode \u00b7 GPT-5.6 Terra (openai/gpt-5.6-terra) 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) # opencode openai/gpt-5.6-terra opencode driving openai/gpt-5.6-terra through OpenRouter, 5 hill-climb rounds from the v1 runbook. Judge, best round 28/40 round v1 (agent's pick) Self-score 38/40 inflation +10 Runs 5 not metered ![opencode · GPT-5.6 Terra best round](https://evaljetty.com/pelicans/img/v2-opencode-gpt56/v1.svg) best round v1 · ccbdd583 ### Self-score vs judge, by axis Best round v1, 0–10 per axis agent self-scoreexternal judge **Judge:** The pelican reads well thanks to the big orange beak with a throat pouch, eye, and head crest, and the pleasant flat palette gives a clean cartoon look. However, the body is an egg blob with an odd notched outline, and the wing is a flat slab reaching an ambiguous handlebar; the frame geometry is muddled, the chain/crank connection is awkward, and the legs overlap the rear wheel clumsily. ### 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). [![opencode · GPT-5.6 Terra round v1](https://evaljetty.com/pelicans/img/v2-opencode-gpt56/v1.svg)](https://evaljetty.com/pelicans/investigations/best-pelican.html#v2-opencode-gpt56/v1) **v1** · best passjudge **28** · self 38 ccbdd583[runbook](https://evaljetty.com/pelicans/author/versions.html#v2-opencode-gpt56/v1) [![opencode · GPT-5.6 Terra round v2](https://evaljetty.com/pelicans/img/v2-opencode-gpt56/v2.svg)](https://evaljetty.com/pelicans/investigations/best-pelican.html#v2-opencode-gpt56/v2) **v2** failjudge **27.5** · self 37.2 699fefde[runbook](https://evaljetty.com/pelicans/author/versions.html#v2-opencode-gpt56/v2) [![opencode · GPT-5.6 Terra round v3](https://evaljetty.com/pelicans/img/v2-opencode-gpt56/v3.svg)](https://evaljetty.com/pelicans/investigations/best-pelican.html#v2-opencode-gpt56/v3) **v3** failjudge **27.2** · self 38 ce858eaf[runbook](https://evaljetty.com/pelicans/author/versions.html#v2-opencode-gpt56/v3) [![opencode · GPT-5.6 Terra round v4](https://evaljetty.com/pelicans/img/v2-opencode-gpt56/v4.svg)](https://evaljetty.com/pelicans/investigations/best-pelican.html#v2-opencode-gpt56/v4) **v4** failjudge **27.3** · self 37.5 9fe62cbb[runbook](https://evaljetty.com/pelicans/author/versions.html#v2-opencode-gpt56/v4) [![opencode · GPT-5.6 Terra round v5](https://evaljetty.com/pelicans/img/v2-opencode-gpt56/v5.svg)](https://evaljetty.com/pelicans/investigations/best-pelican.html#v2-opencode-gpt56/v5) **v5** passjudge **29.8** · self 38 de112455[runbook](https://evaljetty.com/pelicans/author/versions.html#v2-opencode-gpt56/v5) ### Scores per round | Round | Pelican | Bicycle | Composition | Polish | Self total | Judge total | Verdict | Judge spread | Cost | Minutes | Trajectory | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | v1 | 7.2self 10 | 6.5self 9 | 7.2self 10 | 7.2self 9 | 38 | 28 | pass | 3.5 | not metered | 1.4 | ccbdd583 | | v2 | 7self 9 | 6.5self 9.5 | 7self 9.5 | 7self 9.2 | 37.2 | 27.5 | fail | 0 | not metered | 1.7 | 699fefde | | v3 | 8self 9.5 | 6.5self 9.5 | 5.3self 9.5 | 7.3self 9.5 | 38 | 27.2 | fail | 2 | not metered | 1.5 | ce858eaf | | v4 | 8self 9.5 | 6.3self 9.5 | 5.5self 9.5 | 7.5self 9 | 37.5 | 27.3 | fail | 1 | not metered | 1.4 | 9fe62cbb | | v5 | 8self 10 | 6.8self 10 | 7.3self 9 | 7.7self 9 | 38 | 29.8 | pass | 1.5 | not metered | 1.5 | de112455 | --- Source: https://evaljetty.com/pelicans/runs/agents/v2-opencode-gpt56.html · Evals by Jetty · Run your own evals: https://jetty.io/?utm_source=evaljetty&utm_medium=llms