Prompt · Prompts & Workflows

Opus 5 vs Fable 5: the four one-shot test prompts

The four full physics-demo prompts from the Opus 5 vs Fable 5 test. Paste each into both models, no follow-ups, compare the builds.

Added 24 July 2026. Free.

What’s inside

The test in one picture
Run order and timings
1 · The wind tunnel
2 · The gravity sandbox
3 · The double pendulum
4 · Inside the Earth

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