Opus 5.5 turns a year-old sword-fighting game idea into a playable demo

central dogma specialist @takimunkOriginally posted 2026.10.07

Open original on X

this is ridiculously fun! i had an idea for a small game (fast duels like jedi academy + mount & blade + dark souls) and started a repo in 2025, but no model could build anything meaningful, not even astra/fable... until opus 5.5. it took 5 evenings to make a real game. we even cooked a dataset and trained a tiny nn with ~10k parameters for the sword controls. what a time to be alive!