When GPT-5 came out, I created a procedural brutalist city builder as a demo (you can see it in the quoted tweet) I used GPT-5.6 Sol in Codex to do the same thing, touching no code. Less than a year... Play with it (its fun, if you like cities): https://monument-brutalist-city-builder.netlify.app/ https://x.com/emollick/status/2075426533896868046/video/1 https://twitter.com/emollick/status/1953502029126549597

I also like the cyberpunk and totalitarian visualization modes. There is also an achievement-based unlock system in there, traffic & usage, day & night, and a bunch of other stuff. If it runs slow, you can adjust the settings in the upper right If you see bugs, I'll tell Codex. https://x.com/emollick/status/2075434469423452368/video/1