Knowledge base›Sources›Dan George (Little Green Agency)
Dates the disappearance of the fan-out field from the UI JSON to GPT-5.3/5.4 and shows a detour via the Responses API.
Describes a model phase before our measurement series. In our data the field is back - an example that a "vanished" field can return, and that you should check your own HAR before rebuilding an extractor.
| Claim | Status | Evidence |
|---|---|---|
| search_model_queries vanished from the UI JSON with GPT-5.3, fully with GPT-5.4; workaround via the Responses API (web_search_call -> item.action.queries) | outdated | In our data search_model_queries is back in the messages format, both in the metadata and in the SSE stream. The fan-out is readable via the web.run call anyway. |