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Nathan Fennel

63 pelicans · 19 models

Pelicans on Bicycles

Every model on this page was asked the same eleven words, Generate an SVG of a pelican riding a bicycle, and nothing else. Simon Willison started this. The difference in my version is where I ask.

I ask from inside the coding tools I use every day, not from a bare API call. Claude Code, Codex, Cursor, Antigravity, and OpenCode. For each model I pick the harness that best matches how I actually use it, so what you see is the model the way I experience it, with the system prompt and tools it normally carries.

Those tools are how I build real things. Sometimes that means silly games on this site, like QWOP Unicorn or Sundae Rush. Sometimes it is an app my wife asked for. Right now it is “Spider-Man Minecraft,” which my six-year-old has been talking about for a month. A pelican riding a bicycle is not far from the images I actually need generated.

When the models get good enough that a pelican on a bicycle stops being interesting, I will ask for animation instead. Nobody really knows how a pelican would pedal a bicycle, which makes it a good problem to hand to a model that has to work it out.

Pick models to compare below, or scroll for everything. One row per model, one image per effort level, lowest effort on the left. Click an image for the file the model wrote. Working sheet: /pelican/collect.

Everything

AnthropicAnthropic

Opus 3

claude-3-opus-20240229
Opus 3, default effort
default1.1 KB

Fable 5

claude-fable-5
Fable 5, low effort
low11.0 KB
Fable 5, medium effort
medium11.4 KB
Fable 5, high effort
high12.6 KB
Fable 5, xhigh effort
xhigh13.2 KB
Fable 5, max effort
max15.0 KB

Fable 5.1

claude-fable-5-1
Fable 5.1, max effort
max7.1 KB

Haiku 4.5

claude-haiku-4-5-20251001
Haiku 4.5, low effort
low3.1 KB
Haiku 4.5, medium effort
medium4.2 KB
Haiku 4.5, high effort
high3.2 KB
Haiku 4.5, xhigh effort
xhigh4.0 KB
Haiku 4.5, max effort
max2.8 KB

Opus 4.6

claude-opus-4-6
Opus 4.6, medium effort
medium14.7 KB
Opus 4.6, max effort
max14.9 KB
Opus 4.6, thinking 99 effort
thinking 998.0 KB

Opus 4.7

claude-opus-4-7
Opus 4.7, low effort
low10.8 KB
Opus 4.7, medium effort
medium2.8 KB
Opus 4.7, max effort
max12.6 KB

Opus 4.8

claude-opus-4-8
Opus 4.8, high effort
high3.1 KB
Opus 4.8, max effort
max12.9 KB

Opus 5

claude-opus-5
Opus 5, low effort
low1.7 KB
Opus 5, medium effort
medium3.3 KB
Opus 5, high effort
high5.6 KB
Opus 5, xhigh effort
xhigh7.6 KB
Opus 5, max effort
max11.1 KB

Sonnet 4.6

claude-sonnet-4-6
Sonnet 4.6, thinking effort
thinkingraster

Came back as a raster picture, not SVG source.

Sonnet 4.6, low effort
low14.3 KB
Sonnet 4.6, medium effort
medium13.4 KB
Sonnet 4.6, high effort
high13.3 KB

Sonnet 5

claude-sonnet-5
Sonnet 5, low effort
low1.6 KB
Sonnet 5, medium effort
medium3.0 KB
Sonnet 5, high effort
high1.9 KB
Sonnet 5, xhigh effort
xhigh3.5 KB
Sonnet 5, max effort
max6.7 KB

OpenAIOpenAI

GPT-5.3 Codex Spark

gpt-5.3-codex-spark
GPT-5.3 Codex Spark, low effort
low3.6 KB
GPT-5.3 Codex Spark, medium effort
medium4.3 KB
GPT-5.3 Codex Spark, high effort
high3.8 KB
GPT-5.3 Codex Spark, xhigh effort
xhigh3.8 KB

GPT-5.6 Luna

gpt-5.6-luna
GPT-5.6 Luna, low effort
low2.6 KB
GPT-5.6 Luna, medium effort
medium2.1 KB
GPT-5.6 Luna, high effort
high2.4 KB
GPT-5.6 Luna, xhigh effort
xhigh3.8 KB

GPT-5.6 Sol

gpt-5.6-sol
GPT-5.6 Sol, low effort
low2.9 KB
GPT-5.6 Sol, medium effort
medium3.0 KB
GPT-5.6 Sol, high effort
high3.9 KB
GPT-5.6 Sol, xhigh effort
xhigh4.5 KB
GPT-5.6 Sol, ultra effort
ultra5.5 KB

GPT-5.6 Terra

gpt-5.6-terra
GPT-5.6 Terra, low effort
low2.7 KB
GPT-5.6 Terra, medium effort
medium2.1 KB
GPT-5.6 Terra, high effort
high3.1 KB
GPT-5.6 Terra, xhigh effort
xhigh3.1 KB
GPT-5.6 Terra, ultra effort
ultra3.5 KB

GPT-6 Astra

gpt-6-astra
GPT-6 Astra, low effort
low4.0 KB
GPT-6 Astra, medium effort
medium3.4 KB
GPT-6 Astra, high effort
high4.2 KB
GPT-6 Astra, xhigh effort
xhigh6.7 KB
GPT-6 Astra, ultra effort
ultra4.9 KB

GoogleGoogle

Gemini 3.1 Pro

gemini-3.1-pro-preview
Gemini 3.1 Pro, default effort
default7.4 KB

Gemini 3.6 Flash

gemini-3.6-flash
Gemini 3.6 Flash, fast effort
fast11.1 KB
Gemini 3.6 Flash, thinking effort
thinking15.2 KB
Gemini 3.6 Flash, medium effort
medium24.7 KB

Gemini 3.7 Flash

gemini-3.7-flash
Gemini 3.7 Flash, medium effort
medium16.2 KB

Gemini 3.8 Flash

gemini-3.8-flash
Gemini 3.8 Flash, high effort
high26.8 KB