One prompt: Opus 5.5 builds a working interactive Tokyo last-train map in a single shot
minchoi · x · 2026-09-27
A developer challenged "Opus 5.5" with a near-impossible task: build a fully interactive map of Tokyo's last-train schedules — arguably the world's most complex rail network. The model reportedly produced a complete, accurate version in one shot with no errors, which was then deployed as a live working site.
minchoi reshared the demo with a link to try it yourself. The case is being cited as striking evidence of frontier models' single-shot frontend generation capability.
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