Based on information from individuals with knowledge of the situation, Anthropic chose not to have its most recent model, Claude Mythos 5.1, undergo testing by the UK AI Safety Institute before its launch. This is because the model is exclusively accessible to carefully selected U.S. institutions. Information from the UK government reveals that this move has sparked apprehension within Whitehall and the institute itself. However, Anthropic has chosen to remain silent on the matter. The UK Cabinet Office has clarified that the AI Safety Institute is still actively collaborating with industry allies, Anthropic included, to collectively improve the safety of AI models.
