Over one week in mid-May, two companies announced artificial intelligence products built using one of Google’s seminal breakthroughs. On May 13, OpenAI Inc. introduced a new version of the model that underpins ChatGPT, its wildly popular chatbot that relies on a technology known as a transformer that Google first described in a research paper in 2017. The next day, Google announced AI Overviews, a product that offers responses to some searches with answers written by its own system based on the ...