I’m threw a few hours at Codex the other day and was incredibly disappointed with the outcome…
I’m a heavy Claude code user and similar workloads just didn’t work out well for me on Codex.
One of the areas I think is going to make a big difference to any model soon is speed. We can build error correcting systems into the tools - but the base models need more speed (and obviously with that lower costs)
Not GP but my experience with Haiku-4.5 has been poor. It certainly doesn't feel like Sonnet 4.0 level performance. It looked at some python test failures and went in a completely wrong direction in trying to address a surface level detail rather than understanding the real cause of the problem. Tested it with Sonnet 4.5 and it did it fine, as an experienced human would.
I’m a heavy Claude code user and similar workloads just didn’t work out well for me on Codex.
One of the areas I think is going to make a big difference to any model soon is speed. We can build error correcting systems into the tools - but the base models need more speed (and obviously with that lower costs)