UK regains pre-release access to US AI models after White House reversal

What happened

The reversal strengthens UK-US AI collaboration, enhancing global AI safety oversight and reducing risks of fragmented international model releases. That month, the White House asked OpenAI and Anthropic to hold back new models from AISI until US reviews had been completed. Anthropic is an artificial intelligence company based in San Francisco, and its products and services include Claude and Claude Code.

American officials got first look, and British evaluators waited in line until Washington signed off. The post UK regains pre-release access to US AI models after White House reversal appeared first on Crypto Briefing .

12, 2026 Britain’s AI safety testers are back in the room. The UK’s AI Security Institute (AISI) can once again evaluate advanced models from major US developers, including OpenAI and Anthropic , before those models reach the public.

The shift follows a reversal by the Trump administration on October 11, 2026. It restores a voluntary arrangement that Washington had effectively paused only weeks earlier.

What changed, and why it matters The story starts in September 2026. Anthropic restricted the release of its Claude Mythos 5.1 model to US organizations, based on the White House request.

Advertisement The October 11 reversal unwinds that. US developers can again share pre-release models with AISI under the voluntary access setup that existed before the September directive.