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OpenAI details the engineering behind ChatGPT Atlas, a new AI-powered browser built on a custom architecture called OWL (OpenAI's Web Layer), which runs Chromium as an isolated service outside the main app process to enable fast startup, scalability, and agentic capabilities.

OpenAI introduces ChatGPT Atlas, a web browser with ChatGPT built-in that allows users to access AI assistance across the web with integrated memory, context awareness, and agent mode capabilities. The product launches today on macOS for Free, Plus, Pro, and Go users, with Windows, iOS, and Android versions coming soon.