What if Microsoft let OpenAI go free?

Call it a modern-day version of a spectacular Renaissance patronage. Since 2019 Microsoft has provided more than $13bn in cash and computing capacity to OpenAI, a once-penniless startup that is now at the forefront of generative artificial intelligence (AI) and, as of its most recent fundraising round, worth $157bn. In exchange, Microsoft has gained the exclusive right to run OpenAI’s models on Azure, its cloud-computing business.