Ruan Yifeng's weekly roundup features a 3D "Invisible Cities" built by GPT-6 Astra and Claude Opus 5.5

Ruan Yifeng's Tech Weekly issue 415 reports that a user generated 3D versions of Italo Calvino's "Invisible Cities" using GPT-6 Astra and Claude Opus 5.5. The Claude Opus 5.5 renderings are described as far more faithful to the novel than the GPT-6 Astra versions, which look nearly identical across all 55 cities.