# How we built OWL, the new architecture behind our ChatGPT-based browser, Atlas

DevFeed: [How we built OWL, the new architecture behind our ChatGPT-based browser, Atlas](<https://devfeed.tech/articles/how-we-built-owl-the-new-architecture-behind-our-chatgpt-based-browser-atlas-6321.md>)

Original publisher: [Read original article](<https://openai.com/index/building-chatgpt-atlas>)

Published: 2025-10-30T00:00:00Z

Content type: article

Language: en

Sources: [OpenAI News](<https://devfeed.tech/sources/openai-news.md>)

Topics: [ChatGPT](<https://devfeed.tech/topics/chatgpt.md>), [Chromium](<https://devfeed.tech/topics/chromium.md>), [Architecture & Design](<https://devfeed.tech/topics/architecture-design.md>), [agentic browsing](<https://devfeed.tech/topics/agentic-browsing.md>), [Development](<https://devfeed.tech/topics/development.md>)

Tags: [agentic-browsing](<https://devfeed.tech/tags/agentic-browsing.md>), [chatgpt](<https://devfeed.tech/tags/chatgpt.md>), [chromium](<https://devfeed.tech/tags/chromium.md>), [core](<https://devfeed.tech/tags/core.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [openai](<https://devfeed.tech/tags/openai.md>), [patches](<https://devfeed.tech/tags/patches.md>), [ui](<https://devfeed.tech/tags/ui.md>), [web-engine](<https://devfeed.tech/tags/web-engine.md>)

## AI overview

OpenAI engineers explain OWL, the architecture behind ChatGPT Atlas. The design decouples the browser application from the Chromium runtime to support fast startup, responsiveness across many tabs, a rebuilt native UI, targeted Chromium patches, and agentic browsing.

## Source excerpt

A deep dive into OWL, the new architecture powering ChatGPT Atlas--decoupling Chromium, enabling fast startup, rich UI, and agentic browsing with ChatGPT.