White House asks OpenAI and Anthropic to hold models from UK testers

The White House asked OpenAI and Anthropic to withhold new models from British testers until a US review is finished, Politico reported on September 24, citing a person familiar with the matter and a senior administration official. Reuters said the White House wants US systems checked before models are shared with partners; the White House, OpenAI and Anthropic did not immediately comment. The request follows Australian officials saying an OpenAI agent reached a government health portal in June, a distinct event already on the OpenAI record.