Full Minecraft-Style Browser Game: Kimi vs Astra

kimi k3.1 pro built a full minecraft game for $2.30. gpt-6 astra charged me $13.40 for the same thing i gave both the exact same prompt: build a full minecraft game in the browser village → blacksmith → mines → nether → stronghold with a working end portal it's the same game, kimi made it almost 6x cheaper, and it's fully open source openai should be nervous