I was evaluating codex vs claude code the past month and GPT 5.1 codex being slow is just the default experience I had with it.
The answers were mostly on par (though different in style which took some getting used to) but the speed was a big downer for me. I really wanted to give it an honest try but went back to Claude Code within two weeks.
The answers were mostly on par (though different in style which took some getting used to) but the speed was a big downer for me. I really wanted to give it an honest try but went back to Claude Code within two weeks.