Some pundits suggest generative AI stopped getting smarter. The explosive demos from OpenAI and Google that started the week show there’s plenty more disruption to come. OpenAI, denying rumors that it would unveil either an AI-powered search product or its next-generation model GPT-5, instead announced something different, but nonetheless eye-popping, on Monday. It was a new flagship model called GPT-4o, to be made available for free, which uses input and output in various modes—text, speech, vision—for disturbingly natural interaction with humans.