For coding, I've found qwen 3 coder to be the "best" but even the 27b model is not very useful when things like Claude 4.5 are just becoming useful. It's good for checking for typos, or very basic single file changes, and even with a beefy server it's going to take a few minutes to submit a single patch, assuming it gets the tools correct. I've found the smaller instruct models know how to use the tools a little better, but they're dumb and direct.