codex - 💡(How to fix) Fix Unknown parameter: 'prompt_cache_retention [3 comments, 4 participants]

■ Error running remote compact task: { "error": {

TL;DR

The issue is likely due to an unknown parameter 'prompt_cache_retention' in the request, which may be a temporary backend issue or a version compatibility problem.

Guidance

• Verify the Codex CLI version (0.120.0) and check if there are any known issues or updates related to the 'prompt_cache_retention' parameter.
• Review the uploaded thread (019d8a4a-fe19-79d1-957c-3590eafb524e) to see if there are any specific patterns or conditions that trigger the error.
• Check the documentation for the gpt-5.4 default model to see if the 'prompt_cache_retention' parameter is supported or if there are any specific requirements for its usage.
• Consider reaching out to the support team or checking the community forums for similar issues, as the error seems to be related to a temporary backend issue that resolved itself after a few minutes.

Notes

The issue seems to be related to a specific parameter and model, so the solution may depend on the specific use case and configuration. More information about the context and the specific request being made would be helpful to provide a more accurate solution.

Recommendation

Apply workaround: Try removing or modifying the 'prompt_cache_retention' parameter in the request to see if it resolves the issue, as the error message suggests that this parameter is unknown.