Kimi K3 looks very different depending on the harness
victormustar · x · 2026-07-20
Kimi K3 has made the author obsessed with harnesses: depending on which one you use, the same task can swing from an atrocious, ugly output to something that looks like Fable-level quality.
The quoted post says Kimi K3 produced impressive Boeing 747 results, better than Opus-4.8 but still below Fable. This post is basically reacting to that result by saying the evaluation harness matters a lot.
Related event: Kimi K3 Evaluations Show Polarized Results and Harness Sensitivity(5 posts)→
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