What is your use case? I read comments like this and it's totally opposite of my experience, I have both CC Opus 4.6 and Codex 5.4 and Codex is much more thorough and checks before it starts making changes maybe even to a fault but I accept it because getting Opus to redo work because it messes up and jumps in the first attempt is a massive waste of time, all tasks and spec are atomic and granularly spec'd, I'd say 30% of the time I regret when I decide to use Opus for 'simpler' and work

I'm building a correct, safe, highly understandable, concurrent runtime & language.

Essentially Rust/Tokio if it was substantially easier than even Go - and without a need for crates and a subset of the language to achieve near Ada-level safety.

The codebase is ~100k lines of code.