Kimi K3.1 Pro vs GPT-6 Astra and Opus 5.5 on a browser game build
With the same six-step prompt for a dinosaur meteor-dodging browser game, Kimi finished all steps for $0.34, while Astra spent $2.64 on the prettiest build but the dinosaur couldn't duck.
A model that came out 4 days ago beat Opus 5.5 and GPT-6 Astra at building a game, and it cost me $0.34. Kimi K3.1 Pro from Moonshot got the same prompt as the other two: a browser game where a dinosaur dodges meteors, built in 6 small steps. > GPT-6 Astra spent $2.64 on the prettiest game of the three, and the dinosaur can't duck. > Opus 5.5 spent $1.87 and built levels and a score, then skipped the pause button. > Kimi spent $0.34 and was the only one to finish all 6 steps. The steps did most of the work. One feature per step, a check after each one, and even the cheapest model ships the whole game. The exact prompt is in the image. Swap the dinosaur for your own idea and save it.
This post quotes another post: “Opus 5.5 and Remotion: a 30-second launch video written as code”