tldr
- The harness divergences are solvable
- Good luck innovating on harnesses if you don’t own the weights
Rémi 🌳 (@remilouf)
Article
Harnesses Are Protocols
Model performance depends on the harness
Run the same model behind Pi, Codex, Claude Code or OpenCode and you get noticeably different behavior. The weights are identical, but one runtime plans
— https://nitter.net/remilouf/status/2084380139241328851#m