Receiveed error: Unknown parameter: 'input[52].phase'., chat won't continue on this session

Resolved 💬 2 comments Opened Feb 6, 2026 by sirmalloc Closed Feb 6, 2026

What version of Codex CLI is running?

0.98.0

What subscription do you have?

Pro

Which model were you using?

gpt-5.3-codex

What platform is your computer?

Darwin 25.2.0 arm64 arm

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

Ghostty

What issue are you seeing?

Chat started returning this after my prompt:

■ {
  "error": {
    "message": "Unknown parameter: 'input[52].phase'.",
    "type": "invalid_request_error",
    "param": "input[52].phase",
    "code": "unknown_parameter"
  }
}

All future messages result in the same message being displayed. Starting a new session works fine.

What steps can reproduce the bug?

Uploaded thread ID 019c2f09-beaa-7f70-a90c-9ae80058e84f

What is the expected behavior?

_No response_

Additional information

_No response_

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