The Trump administration reversed on October 11, 2026 a directive that had blocked British AI safety testers from accessing OpenAI and Anthropic models before US reviews were completed. UK AI Minister Kanishka Narayan advocated for the reversal, arguing that established trust relationships with developers were being undermined. This decision restores a voluntary arrangement allowing British AISI testers to evaluate advanced models before public release. Anthropic had restricted its Claude Mythos 5.1 model to US organizations in response to the initial directive. AISI was established at the AI Safety Summit held at Bletchley Park in November 2023.
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