The artificial intelligence hype cycle depends on flashy announcements that break records. In April, San Francisco-based start-up Xaira delivered just that, announcing that it had raised $1bn in one of biotech’s biggest ever launches. 

Xaira claims that drug development is poised for an AI revolution. It is not alone. Demis Hassabis, co-founder of Google DeepMind, famous for solving the 50-year-old scientific challenge of protein shape prediction, argues that biology could be “perfect” for AI, as it is fundamentally an information processing system. He heads Isomorphic Labs, Alphabet’s AI drugs offshoot which has agreed partnerships worth up to $3bn with Eli Lilly and Novartis. It aims to halve the drug discovery stage to just two years. 

Growing numbers of AI-derived compounds are under development. The World Health Organisation has identified at least 73, though none are yet approved for use in humans. Some companies are getting close. Insilico Medicine, which recently filed for a Hong Kong IPO, was the first to get an AI-designed drug into Phase II clinical trials.