Nvidia is set to invest up to $100bn in OpenAI and supply the ChatGPT-maker with advanced data centre chips, in one of the most significant partnerships yet in the global race to dominate artificial intelligence. OpenAI will pay Nvidia in cash for chips, while Nvidia will take non-controlling shares in the AI start-up, according to a person close to the company. The first tranche of the investment, worth $10bn, will be triggered when OpenAI signs a definitive agreement to purchase Nvidia chips. Nvidia, already the world’s most valuable company with a $4tn market capitalisation, had previously injected $6.6bn into OpenAI. Both companies signed a letter of intent to deploy at least 10GW of Nvidia’s chips to power OpenAI’s infrastructure, underscoring the vast scale of their ambitions.