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Opus 5.5 builds an interactive visualization of Invisible Cities

quesma.com 3 min read Editor score 6/10

The author reports using Opus 5.5 for six hours to create an interactive visualization, and contrasts its design work with earlier model-assisted projects. It offers a practitioner’s view of where model-assisted visual design may improve, though the assessment is subjective.

What

- Claude Opus 5.5 was given a one-shot prompt to make an interactive three.js visualization of Italo Calvino’s Invisible Cities.

How

- Claude Code said it had used roughly half the six-hour allowance, but the author reports it actually ran for 1 hour 25 minutes with six subagents.

Why it matters

- The task shows an agentic model handling an end-to-end interactive coding project, while the reported time discrepancy is relevant to evaluating agent runs.

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