Sources: the US restores the UK AISI's access to the latest US models for safety testing, after ordering OpenAI and Anthropic to stop sharing models last month (Tony Diver/Telegraph)

The US has reinstated the UK's Artificial Intelligence Safety Institute's (AISI) access to the latest US AI models for safety testing. This decision comes after the US previously instructed OpenAI and Anthropic to cease sharing their models last month. The earlier blockage prevented UK regulators from reviewing frontier models from companies including Anthropic, OpenAI, and Google DeepMind, highlighting ongoing international collaboration and regulatory adjustments in AI safety.

This report details the US reversing its earlier decision to block the UK's AISI from accessing frontier AI models, unlike previous reports that only covered the initial restriction.