I'm impressed! I've been giving the various open-weight models a particularly gnarly (for my brain, at least) refactoring/cleanup task in my DIY coding harness[0] - essentially, de-spaghettifi the main chat view's update logic, which had grown organically since early 2024.

Kimi 2.6 went hard and left me with a buggy mess. GLM 5.1 hedged and made a 25 line change (but it was an improvement). DS V4 went hard, fixed its issues along the way, and left me with a significantly nicer codebase! (...that I will now be spending some time testing before releasing to the project)

[0]: lmcli (simple, Go, nice UX, MIT licensed, works well with DS V4) https://codeberg.org/mlow/lmcli