{
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  "path": "/t/gpt-5-4-mini-warning-in-agent-builder-but-logs-show-it-s-still-being-used/1379585#post_2",
  "publishedAt": "2026-04-24T19:30:17.000Z",
  "site": "https://community.openai.com",
  "tags": [
    "documentation",
    "@michael129"
  ],
  "textContent": "Welcome to the dev Community! @michael129\n\nBased 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.\n\nIt’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.\n\nIf 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.\n\n~Smith",
  "title": "gpt-5.4-mini warning in Agent Builder, but logs show it’s still being used"
}