codex - 💡(How to fix) Fix /realtime does not work [1 comments, 2 participants]

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openai/codex#17495Fetched 2026-04-12 13:27:41
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Error Message

I enabled realtime_conversation using the command "codex features enable realtime_conversation" and checked my config.toml to confirm that it set realtime_conversation = True. However, when I try to use /realtime in the codex cli I get the following error: ■ Realtime voice error: unexpected status 404 Not Found: {"detail":"Not Found"}, 4. Note 404 realtime voice error

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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 24.3.0 arm64 arm

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

MacOS standard terminal

What issue are you seeing?

I enabled realtime_conversation using the command "codex features enable realtime_conversation" and checked my config.toml to confirm that it set realtime_conversation = True. However, when I try to use /realtime in the codex cli I get the following error:

■ Realtime voice error: unexpected status 404 Not Found: {"detail":"Not Found"}, url: https://chatgpt.com/backend-api/codex/realtime/calls, cf-ray: 9ead10a06b91 44d9-ATL, request id: e7f48797-74c9-4033-aad9-9850b03e3fff

I've tried restarting codex as well as logging out and logging in again and nothing is helping. Any other things I should try or is it currently broken?

What steps can reproduce the bug?

  1. Run "codex features enable realtime_conversation"
  2. Open codex cli using "codex"
  3. Inside the codex cli, use /realtime
  4. Note 404 realtime voice error

What is the expected behavior?

Codex initiates realtime voice mode

Additional information

No response

extent analysis

TL;DR

The issue may be resolved by checking the Codex CLI configuration and ensuring that the realtime_conversation feature is properly enabled and configured.

Guidance

  • Verify that the config.toml file has been correctly updated with realtime_conversation = True after running the codex features enable realtime_conversation command.
  • Check the Codex CLI version (0.120.0) for any known issues or updates related to the realtime_conversation feature.
  • Attempt to disable and re-enable the realtime_conversation feature using the codex features command to ensure proper configuration.
  • Review the error message for any clues about the issue, such as the 404 status code and the URL https://chatgpt.com/backend-api/codex/realtime/calls, which may indicate a problem with the backend API.

Example

No code snippet is provided as it is not explicitly supported by the issue.

Notes

The issue may be related to a configuration problem or a temporary issue with the backend API. Further investigation is needed to determine the root cause.

Recommendation

Apply workaround: Try disabling and re-enabling the realtime_conversation feature to ensure proper configuration, as this may resolve the issue temporarily until a more permanent fix is available.

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