Pledge spanning five years from world’s most valuable firm comes as concerns about AI agents have risen

The $5.5tn (£4.1tn) US chipmaker Nvidia is donating $250m worth of computing power to the UK to support AI safety research.

The donation from the world’s most valuable company comes as the UK government confirmed its AI Security Institute, which tests advance AI models, will be able to examine cutting-edge technology developed by companies such as OpenAI, Anthropic and Google before they are released.