Exhibit No. 012 · 3D worlds

Solar system simulation

An animated solar system where planets orbit at speeds based on their real orbital periods.

Prompt

> Create an animated solar system simulation in a single HTML file, with planets orbiting the sun at relative speeds based on their real orbital periods.

What it tests

Factual accuracy inside code, plus animation and presentation.

Origin

Community classic

Prompt wording adapted from the original.

Difficulty

●●●

Results

Verdicts are our own assessment of each answer.

Claude Opus 5.5

Pass

Run on 2026-10-19Open the raw answer

Test conditions

Single attempt per test, no retries and no edits afterwards. Run inside a Claude Code agent session, which includes its own system prompt, rather than the raw API.

All results for Claude Opus 5.5

Run it yourself

Paste the prompt into the model or agent you want to test. Save the answer as a .html file and open it in a browser.

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