Opus 5.5 用 Unreal 重建旧金山，Jev 驱动全城 NPC

rewind @rewind02原推发布于 2026.10.11

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Matthew Berman had Claude Opus 5.5 recreate San Francisco in Unreal Engine... and every person, pet and car in it is driven by Jev the trick is splitting the work: Opus builds the city, Jev runs the life inside it, but there's a smart way to set it up: - step 1: connect Claude Code to Unreal Engine through MCP, and have Opus read the project first - step 2: feed it real city data: building footprints, heights, the street grid - step 3: Opus generates the city block by block: downtown towers, parks, the bay, the bridge - step 4: add the life: pedestrians, pets, cars, buses on real streets - step 5: every agent asks Jev a quick question: cross now or wait? which lane? where next? - step 6: Jev answers in under a second for fractions of a cent, so thousands of agents can decide on their own - step 7: build and check one district at a time, then fly the camera out over the whole city and that's why it works at this scale... a reasoning model is too slow and too expensive to decide for thousands of cars a decision model was built for exactly that Opus builds, Jev decides

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