According to karpathy, Claude Opus 5 used a 1M token run to generate 5,500 lines of Three.js code rendering LoTR, revealing promise and audit limits.

According to Ethan Mollick, Fable built a Piranesi-style city builder with arches and waterways in vast ruins; play it at capriccio-city.netlify.app.

According to @emollick, Kimi K3 generated a twigl shader of neo‑gothic ocean towers and improved it on prompt, showing strong open weights performance.

According to @emollick, GPT5.6 Sol in Codex rebuilt a procedural city builder and created DEEP TIME without manual coding, showing rapid AI dev gains.

According to EthanMollick, GPT5.6 Sol in Codex recreated a procedural brutalist city builder without code in under a year of progress.