gpt-5.4-mini warning in Agent Builder, but logs show it’s still being used

Welcome to the dev Community! @michael129 Based on the model documentation, gpt-5.4-mini does list support for the /v1/responses endpoint, which corresponds to the Responses API. So it should be compatible. It’s possible the warning you’re seeing in Agent Builder is a UI/validation issue rather than an actual fallback, especially if your logs are still showing requests being processed with gpt-5.4-mini. If you’re able to share a screenshot of where the warning appears in the Builder (e.g., model selection or agent config view), that would help others here take a closer look and compare setups. ~Smith