My model + harness stack these days:
- Kimi K3 is the best OSS coding model. GLM-5.3 is next.
- DeepSeek V4.1 Flash is my pick for easy/moderate tasks: insanely fast and cheap.
- I reach for Astra for complex tasks.
- Codex works better with OSS models. Claude Code can make the same model cost 2x more.