litellm - 💡(How to fix) Fix [Bug]: Prompt Cache Not Working with GPT-5.4 via litellm proxy, but works with direct OpenAI API [1 participants]

TL;DR

• The issue may be resolved by adjusting the use_litellm_proxy configuration to true and verifying that the cache_control parameter is correctly passed through the litellm proxy to the GPT-5.4 model.

Guidance

• Review the litellm proxy configuration to ensure it is correctly set up to handle cache control parameters.
• Verify that the cache_control parameter is being passed correctly from the client to the litellm proxy and then to the GPT-5.4 model.
• Check the litellm proxy documentation to see if there are any specific settings or configurations needed to enable caching with the GPT-5.4 model.
• Test the caching behavior with a simplified setup to isolate if the issue is specific to the litellm proxy or the GPT-5.4 model integration.

Example

No specific code example can be provided without more details on the litellm proxy and GPT-5.4 model integration, but ensuring the use_litellm_proxy is set to true and the cache_control parameter is correctly formatted and passed through might look something like adjusting the configuration to include these settings.

Notes

The provided issue lacks specific log output or detailed configuration settings, making it challenging to provide a precise solution. The suggestions are based on the information given and may require further investigation into the litellm proxy and GPT-5.4 model documentation.

Recommendation

• Apply workaround: Adjust the use_litellm_proxy configuration to true and verify the cache_control parameter handling, as this seems to be a configuration or integration issue rather than a version-specific problem.