One prompt, one song: Opus 5.5 runs 12 hours autonomously and delivers a finished piece

minchoi · x · 2026-10-02

AI creator minchoi shared an experiment: he gave Claude Opus 5.5 a single prompt plus a piece of music, left it running for 12 hours, and woke up to a finished work. Details of the workflow weren't disclosed, but it showcases long-horizon autonomous execution for creative generation.

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