Getting responses in JSON

What version of Codex CLI is running?

codex-cli 0.120.0

What subscription do you have?

Pro

Which model were you using?

GPT-5.4

What platform is your computer?

Darwin 25.1.0 arm64 arm

What terminal emulator and version are you using (if applicable)?

Ghostty in Cmux

What issue are you seeing?

Model responds to me in JSON, as if it forgot to sanitize the response.

What steps can reproduce the bug?

Uploaded thread: 019d8528-7284-7531-a593-bc77b03938f2

What is the expected behavior?

_No response_

Additional information

_No response_