Tested Kimi K3 for Coding
speckx
36 points
9 comments
July 20, 2026
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Discussion Highlights (4 comments)
garciasn
Saving you a click: > I decided to try it out and see if it could optimize my Rust program. > Kimi K3 had 2 recommendations, and I decided to have it pursue the SWAR optimization—SIMD Within a Register. With SWAR, a single 64-bit value is treated as 8 eight-bit values—so we can handle 8 u8 values (single-byte) at once. > Kimi K3 took about 15 minutes for the task, and it completed it perfectly. I found the optimization sped up the program by 2%. > It cost about $1 for the tokens on OpenRouter.
codemog
Should have given the other frontier models a chance too? What if Fable or GPT-5.6 would have found a 30% speed up? Not like a sample size of one means much though.
ur-whale
> Tested Kimi K3 for Coding TLDR: Kimi K3 is good, but the data point is minuscule.
kxxx
Author couldn't be bothered to compare any other models? ok man