On 1 April 2024, the United States and the United Kingdom signed a memorandum of understanding to coordinate AI safety testing through their national AI Safety Institutes. The agreement turns earlier AI Safety Summit commitments into a working channel for model evaluations, research alignment, information sharing, and possible personnel exchanges.

The public significance is that advanced-model testing is becoming a formal area of state-to-state technical cooperation. The two institutes intend to develop a shared approach to model evaluations, perform at least one joint test of a publicly accessible model, and build links with other governments on AI safety testing standards.