[catketch]

-codex variant models in earlier version were just fine tuned for coding work, and had a little better performance for related tool calling and maybe instruction calling.

in 5.4 it looks like the just collapsed that capability into the single frontier family model

[akmarinov]

They’ll likely come out with a 5.4-Codex at some point, that’s what they did with 5 and 5.2

[simianwords]

Yes so I’m even more confused. Why would I use codex?

[joshuacc]

Presumably you don’t anymore if you have 5.4.

[energy123]

You choose gpt-5.4 in the /model picker inside the codex app/cli if you want.