KIMI K3.1 PRO IS MAKING 3D GENERATION WAY CHEAPER i asked both models to build the exact same animated 3D tabletop railway. → detailed train tracks, miniature stations and tiny buildings → a fully animated railway world with moving elements → Kimi: 18 mins vs GPT-6 Astra: 29 mins → Kimi: $6.20 vs GPT-6 Astra: $16.40 roughly 1.6x faster and 2.6x cheaper for a comparable result. open weight models are getting seriously competitive with frontier AI.