In some aspects yes, i even found the latest sonnet to be better than the latest opus and cheaper too!

both serve. codex feels tighter on surgical edits — quick patterns, less thinking out loud. sonnet earns its keep on anything multi-step, context-heavy, where the reasoning chain matters. di tradeoff shows in long agentic runs — sonnet holds context, codex ships faster on clear tasks. run di on...

It definitely seems to burn through less tokens for smaller tasks.