Codex in VSCode does not adhere to `chatgpt.apiBase` setting

Question

### What version of Codex is running?

0.4.3

### Which model were you using?

gpt-5

### What platform is your computer?

_No response_

### What steps can reproduce the bug?

1. Change the VSCode settings `chatgpt.apiBase` to any url.
2. Try to run codex

### What is the expected behavior?

Codex should adhere to the new base url

### What do you see instead?

Base url is not used

### Additional information

_No response_