Kimi K3 Outperforms GPT-5.5 in Game Generation Test
ChrisGPT · x · 2026-07-18
A developer tested the open-source Kimi K3 Standard model to generate an indie spaceship game, comparing it against closed-source models.
- Performance: Kimi K3's first-generation results significantly outperformed GPT-5.5, yielding a more cohesive game with fewer bugs. While its visual quality fell short of Claude 5 Fable (after three iterations), the gap is small and could likely be closed with a few iterations.
- Cost: Kimi K3's API costs were extremely low at roughly $2.50, whereas GPT-5.5 cost about $14 and Claude 5 Fable around $22.
In a quoted tweet, the author marveled that Claude 5 Fable even generated openable lockers, holographic star maps, and a complete 3D spaceship exterior—a level of quality entirely unachievable just a few months ago.
Related event: Kimi K3 Beats GPT-5.5 in Game Generation Test(2 posts)→
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