I've been previewing this in Codex for a few weeks – it's very good!
— Simon Willison (@simonw) 23 avril 2026
Had some great results from it having it run security reviews against code written using other models https://t.co/MHVbOboODq
I've been previewing this in Codex for a few weeks – it's very good! Had some great results from it having it run security reviews against code written using other models