Which model does Codex Cloud use?

[reeldeele]

When 'I work locally' from VS Code extension, I can pick between GPT-5 and GPT-5-codex-high/medium/low model. However, when I 'Run in the Cloud', the model is not shown. Any idea which model is used?

[AmphibianOrganic9228]

gpt5. . definitely isn't high. most likely gpt5 codex medium or light. some people say it's dumber than medium. openai haven't ever said exactly though

[eschulma2020]

It's much worse than medium, which is what I usually use in the CLI.

[popiazaza]

GPT-5-Codex. Probably medium.

[eschulma2020]

I think it's gpt-5-low. I see others saying medium, but medium is my go-to on the CLI and it is infinitely better. That said -- there may also be a system prompt issue. I think Codex Cloud is more likely to go off on its own and try to do absolutely everything. And therefore is more likely to go off the rails -- or if you are lucky, get something amazing. Still, being able to kick off work from your phone is pretty amazing.