ChatGPT Models 5.3 and 5.4 not supported on Business ChatGPT account

Resolved 💬 4 comments Opened Mar 17, 2026 by chironjit Closed Mar 17, 2026

💡 Likely answer: A maintainer (etraut-openai, contributor) responded on this thread — see the highlighted reply below.

What version of the Codex App are you using (From “About Codex” dialog)?

v0.115.0

What subscription do you have?

ChatGPT Business

What platform is your computer?

Linux 6.17.0-19-generic x86_64 x86_64

What issue are you seeing?

Requests error out when trying to use the latest models (5.3 and 5.4). The error is something like:

{"detail":"The 'gpt-5.4' model is not supported when using Codex with a ChatGPT account."}

I am using my chatGPT business account but codex registers it as a free account

What steps can reproduce the bug?

Install codex
Sign in to codex
Check status (says "Free")

Repeating the login process (logout then login) does not help

What is the expected behavior?

Should show up as a business account

Additional information

On checking the status, account being seen as Free account, despite it being a paid business account

View original on GitHub ↗

4 Comments

etraut-openai contributor · 5 months ago

The most common cause of this is different email addresses used for business and free accounts. Make sure you're signing in with the right one.

chironjit · 5 months ago

I do not have a personal account and I am using my business account email as the login (i have also confirmed this via /status)

chironjit · 5 months ago

To add, I am logged in using the browser method. There is a bug in the website that hides the device login enablement button after loading, so I can't try that method to log in (which is not related to codex)

chironjit · 5 months ago

I have figured this out - needed administrator setting to enable team plan access.