Given the [K3 setup](https://runta.com/blog/introducing-frontierharness-eval/ https://runta.com/blog/introducing-frontierharness-eval/), how much of the cost ga

Given the [K3 setup](https://runta.com/blog/introducing-frontierharness-eval/ https://runta.com/blog/introducing-frontierharness-eval/), how much of the cost gap comes from Claude Code’s harness design versus its fit with the model and caching backend?