Kimi K3以一半成本击败Opus 4.8，构建复古游戏

Kimi K3 just beat Opus 4.8 at building retro games for half the cost.

Atomic Chat, a desktop app that runs LLMs locally, asked each model to build Road Fighter, Battle City, and Q*bert as self-playing HTML files.

To make each result work, the graphics, enemies, game rules and a player that could play on their own all had to be in the same file.

Because a single error can ruin the entire simulation, setup tests are more important than code generation.

Outputs: Kimi K3: 18.4K tokens, $0.28 GPT-5.6: 18.1K tokens, $0.28 Opus 4.8: 21.3K tokens, $0.54

GPT-5.6 generated the best looking textures, but the logic for the cars/tanks did not work. Shows how great looks can be deceiving for poor control and state management.

Kimi's best work was Q*bert, where the agent changed the state of the cube, moved around the pyramid, and avoided an enemy, without breaking the game loop.