Anthropic engineer publishes the full prompts behind a dozen Opus 5.5 code-made films

EricBuess · x · 2026-10-20

Anthropic's dfeinition published "The prompts behind my Opus 5.5 films," documenting the full prompts, steering techniques, and lessons behind the dozen-plus films and demos made entirely in code for the Opus 5.5 launch.

Working on demos at Anthropic, the author focused on animation and motion design, an area where Opus 5.5 kept surprising — a hands-on workflow writeup for anyone driving cinematic animation through code with a model.

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