“It'd be really nice to have a service that was sort of just observing your life and proactively helping you when you needed it,” said OpenAI CEO Sam Altman in a recent Q&A about OpenAI’s plans. This vision is at the heart of a new crop of AI browsers, notably OpenAI’s ChatGPT Atlas and Perplexity’s Comet.

AI browsers differ from traditional browsers in at least two important ways. An omnipresent button in the top right corner of the screen summons a chatbot, allowing you to ask questions about the content you’re viewing—clarifying the article you’re reading, or explaining the image that you’re looking at, for example.

You can also delegate whole tasks to the AI through an agent mode, such as making changes to a Google doc or doing Amazon shopping on your behalf.

But the convenience c

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