Kimi K3 spends three hours testing and optimizing a 3D WebGL build that Fable 5 finished faster
heypearlai · x · 2026-07-22
A side-by-side build test says Kimi K3 and Fable 5 took very different paths to the same 3D WebGL stadium project.
According to the post, Fable finished in under an hour, while Kimi took almost three hours—but Kimi spent that time running end-to-end tests, fixing failures, and optimizing for low-end hardware.
The punchline is that Fable “finished,” but Kimi acted more like vibe engineering than vibe coding.
Related event: Kimi K3 vs Fable 5: Kimi Lags in 3D Coding Test(2 posts)→
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