OpenAI has restricted the initial rollout of its latest frontier AI models at the request of the US government, marking the first time the company has staggered a flagship release at Washington’s request. Previous generations of ChatGPT were released according to the company’s own schedule and directly to the public.

The decision follows a similar move by Anthropic, which earlier this month disabled access to its Fable 5 and Mythos 5 models three days after launch, after receiving a US government export control directive citing national security concerns.

In a statement on Friday, OpenAI said that it had begun “a limited preview of the GPT 5.6 series… for a small group of trusted partners whose participation has been shared with the government.” The company said the “short-term” arrangement is intended to bridge the gap while the administration develops a framework for reviewing frontier AI models under US President Donald Trump’s June 2 executive order.

The firm has insisted that it believes in “broad access” and said it plans to make the new models – Sol, Terra and Luna – generally available in the coming weeks.

Axios and The Verge reported on Saturday that Mythos 5 has been restored on a limited basis given that Anthropic has addressed the government’s concerns, while restrictions on Fable 5 remain in place. US Commerce Secretary Howard Lutnick said in a June 26 letter to Anthropic co-founder Tom Brown that the company’s engagement with authorities had “yielded significant progress.”

Some mainstream media and policy commentators have argued that the US government is expanding its influence over the rollout of cutting-edge AI systems without a clear legal framework. Some have warned that ad hoc oversight could reduce predictability for developers and ultimately weaken the competitiveness of US AI firms.

The tighter scrutiny marks a shift in the administration’s approach to artificial intelligence. After returning to office in 2025, Trump championed minimal regulation, calling AI “a beautiful newborn baby” that is key to competing with China and warning against “politics or stupid rules” that could hinder its growth.

In recent weeks, however, the administration has embraced closer oversight of frontier AI models, citing growing cybersecurity and national security concerns as increasingly capable systems become available.