Testing Kimi K3 for Rust Code Optimization in 2026

Tested Kimi K3 for Coding

I tested the new Kimi K3 model to optimize a complex Rust function I had struggled with. After setting it up in OpenCode, Kimi K3 suggested and flawlessly implemented a SWAR optimization, boosting performance by 2%. The process took 15 minutes and cost about $1, proving the model delivers near-frontier quality for real-world coding tasks.

"Kimi K3 both decided on an appropriate optimization, and implemented it with no errors—it seems to me that Kimi K3 could well be a frontier-level model as advertised."