US asks OpenAI and Anthropic to withhold new AI models from the UK

The US government has reportedly requested OpenAI and Anthropic to delay the release of their new AI models to the UK, according to a social media post. This request, reportedly from the White House’s Office of the National Cyber Director, aims to ensure these models undergo US government review before being accessible to UK entities, particularly the AI Security Institute (AISI). This development is part of a broader US strategy to control the deployment of advanced AI technologies. The move may impact the UK’s access to cutting-edge AI advancements, potentially affecting the competitive positioning of companies like Anthropic.

This directive appears to align with previous measures by the US to regulate foreign access to advanced AI models. Earlier actions included restrictions on Anthropic’s top models and controlled rollouts by OpenAI. As the UK’s AISI is a major public model-testing body, this withholding could limit its ability to test frontier AI models, impacting its insights into technological advancements and security assessments.

Market participants may interpret these developments as potentially affecting Anthropic’s competitive edge in the rapidly evolving AI landscape. With the market currently pricing Anthropic as a contender for having the best AI model by the end of October 2026, the US intervention could introduce new uncertainties in this forecast.

Key Takeaways

• The US government’s request to withhold AI models from UK testers suggests a move to control foreign access to advanced technology.
• This development appears consistent with previous US actions to regulate the deployment of AI models internationally.
• Markets may view the withholding as potentially affecting Anthropic’s standing in the race for leading AI models.

What to Watch

Watch for any formal statements from the White House or involved companies, such as OpenAI or Anthropic, regarding the specifics of this request. The UK’s response, particularly from the AI Security Institute, could provide further insights into how this may affect international AI collaboration and competition. Market participants might also track any shifts in market pricing for Anthropic’s likelihood of leading in AI model rankings by the end of October 2026, as this situation unfolds.

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