OpenAI launches ChatGPT Atlas browser for Mac with Agent Mode

OpenAI unveiled ChatGPT Atlas in late October 2025, introducing its first standalone web browser that embeds the companys ChatGPT assistant directly into the browsing experience and is initially available for macOS. The Chromium‑based browser offers a persistent ChatGPT sidebar, an Ask ChatGPT button that provides contextaware summaries and editing help on any page, and an Agent Mode that can perform multistep tasks such as researching trips, filling forms, and making reservations on a users behalf.

OpenAI said Atlas sits natively inside webpages so users can highlight text to get instant summaries, product comparisons, or writing suggestions without copying and pasting. The company built Atlas on Chromium to allow users to import bookmarks, passwords, and many Chrome extensions. Basic ChatGPT features are available to free accounts, while Agent Mode and some automation features require paid Plus, Pro, or Business subscriptions, OpenAI executives said. The browser includes optional browser memories that can recall prior browsing context to personalize responses, and controls that let users delete history and opt out of having browsing data used to train models by default.