How one employee's exit shook Google and the AI industry

In September, Timnit Gebru, then co-leader of the ethical AI team at Google, sent a private message on Twitter to Emily Bender, a computational linguistics professor at the University of Washington. "Hi Emily, I'm wondering if you've written something regarding ethical considerations of large language models or something you could recommend from others?" she asked, referring to a buzzy kind of artificial intelligence software trained on text from an enormous number of webpages. The question may sound unassuming but it touched on something central to the future of Google's foundational product: search. This kind of AI has become increasingly capable and popular in the last couple years, driven largely by language models from Google and research lab OpenAI. Such AI can generate text, mimicking everything from news articles and recipes to poetry, and it has quickly become key to Google Search, which the company said responds to trillions of queries each year. In late 2019, the company started relying on such AI to help answer one in 10 English-language queries from US users; nearly a year later, the company said it was handling nearly all English queries and is also being used to answer queries in dozens of other languages.