ChatGPT Atlas Didn't Make It to Its First Birthday, and Comet Just Inherited the Race

ChatGPT Atlas launched October 21, 2025. OpenAI is shutting it down on August 9, 2026, not quite ten months later, folding its browser-agent capability back into the core ChatGPT and Codex products instead of maintaining it as a standalone browser. Users were told to export their bookmarks to an HTML file before the deadline, since nothing migrates automatically.

Meanwhile Perplexity's Comet, the other major standalone AI browser, kept growing through the same window, reaching an estimated 18 million monthly active users by mid-2026, with roughly 41% quarter-over-quarter growth, a slower rate than Atlas posted before OpenAI killed it, but a rate that's still climbing rather than getting cancelled.

What this actually tests

This isn't simply "OpenAI's browser lost to Perplexity's." It's a live experiment in a more basic question: is a standalone AI browser a durable product category on its own, or is browser-level AI agency more naturally a feature bolted onto a chat app people already use, rather than something that justifies switching your entire daily browser. OpenAI's decision to fold Atlas back into ChatGPT rather than keep investing in it as a separate product is a real answer to that question, at least for one of the two largest players in the space.

For anyone evaluating browser-agent tooling for a team workflow, that's directly relevant: a roadmap built around a standalone AI browser now has one fewer major vendor in the category, and the one company that tried it and pulled back chose to route the capability through its existing chat product instead. Worth asking any vendor in this space directly which of these two paths they're actually committed to, before building a workflow around a standalone browser that might get folded into something else within a year.