Overview
- Atlas is available globally on macOS today, with Windows, iOS, and Android versions coming soon, and agent mode limited in preview to Plus, Pro, and Business users.
- The browser keeps a ChatGPT companion beside pages by default via a split‑screen view, includes an Ask ChatGPT sidebar, and offers inline editing through a “cursor chat” feature.
- Optional browser memories personalize the experience and are fully user‑controlled, and OpenAI says browsing content will not be used to train future models by default.
- Built on Chromium, Atlas’s agent operates only within browser tabs under safety constraints, avoiding code execution, local file access, downloads, and unsupervised actions on sensitive sites.
- The debut escalates competition with Google’s Chrome as well as Perplexity, Microsoft Edge, and Opera, and Alphabet shares fell about 3% following the announcement.