I use Claude Code, haven't used Codex yet (should I?) - but in Claude code you can spin up sub-agents to handle these big refactors, with the master context window just keeping track of the overall progress, bugs, etc and providing instructions to the subagents to do the rote work.
IMO yes. It is less polished but IMO the model is way better. I moved over from claude completely and cancelled my max subscription. Less polished, slower but the results are better and you have to do less steering
