Kimi K3, GPT-5.6 Sol and Fable 5 all got the exact same game design prompt. Three things were measured: build speed, design quality and gameplay feel.Kimi K3 understood what made the game fun, added the right features and kept the pace natural. Both Fable 5 and GPT-5.6 Sol made the gameplay feel too fast.The final scores on design, features and cost:→ Kimi K3: 9.5/10 at $0.030→ Fable 5: 7.5/10 at $0.38→ GPT-5.6 Sol: 7/10 at $0.11