ChatGPT Atlas is a macOS web browser from OpenAI that embeds ChatGPT directly into the browsing experience so users can get context-aware help without leaving web pages. It provides an Ask ChatGPT sidebar and cursor-aware interactions that let the model read page content, summarize information, answer questions, and take multi-step actions. Atlas includes Agent Mode for end-to-end task completion (e.g., research, assemble shopping lists, add items to carts) while keeping the user in control, and Browser Memories to remember relevant browsing facts to improve future assistance. Atlas supports importing bookmarks, passwords, and history from other browsers, offers data controls and privacy settings (including controls for training and filtering of sensitive data), and is designed for Apple silicon Macs with automatic updates and site-permission management.