What happened to ChatGPT Atlas
OpenAI shut Atlas down on August 9, 2026. It had been OpenAI’s own browser, Chromium underneath with ChatGPT’s agent mode built in, and it only ever ran on macOS. OpenAI sent its users two ways on the way out: to the ChatGPT desktop app for browser-based agentic work, and to its Chrome extension, a sidebar, for help while browsing in Chrome.
Moving out was the annoying bit. Bookmarks had to be exported by hand and browsing history didn’t transfer at all, so for anyone who’d made Atlas their main browser, a great deal of “where was that page again” simply went.
Moving bookmarks and passwords
An exported bookmarks file is plain HTML, and Chrome, Edge and Brave will each import one from their bookmark settings in about a minute. Without an export I don’t know of a way to get them back, and I’d rather not send you rummaging through folders on your Mac on a hunch.
Passwords need more care than bookmarks. Anything stored in a separate password manager is fine where it is; point the new browser at it. Anything the browser was saving for you, check before assuming it carried over, and reset what’s missing, email account first, because every other reset link lands there.
Logging in to websites, then and now
Atlas kept your sessions inside Atlas. Whichever browser you pick next, you’re signing into everything again (the standard tax on switching browsers, which anyone who moved into Atlas has now paid twice).
dassi has no sessions of its own. It works on the ones already in Chrome, Edge or Brave. When a site has logged you out, it signs in with whatever your browser’s password manager autofills, and you type the 2FA code yourself. The password stays in the password manager, and you never paste it into a chat or into dassi’s settings.
When to choose OpenAI’s replacements
For some people, having ChatGPT beside the page they were reading was the whole appeal of Atlas, and OpenAI’s Chrome extension covers that without another browser. Agent-style work inside ChatGPT now goes through the desktop app. If you’re settled on ChatGPT and already live in Chrome, that’s where I’d start.
When to choose dassi
I think Atlas taught a lesson bigger than OpenAI. A browser built around an assistant asks you to move your whole online life into it, and when it closes, the move runs in reverse on somebody else’s schedule. I’d rather the assistant came to the browser. That’s how dassi is built: it lives in Chrome, Edge or Brave, on a Mac or a Windows PC, and your bookmarks and sign-ins stay the browser’s business, not ours. Should dassi vanish tomorrow (we’d rather it didn’t), you’d remove it and find everything where you left it. Put the same question to any AI browser on your shortlist; Perplexity’s Comet is its own browser, and Dia runs only on Apple Silicon Macs for now, with Windows in beta.
What you’d actually use it for is the agent part Atlas had. Say you check three supplier sites for price changes every Friday. You’d walk dassi through that once, save it, and from then on it’s a click, or a schedule if you leave the browser open. GPT can still do the thinking if you liked it, or you can swap in Claude, Gemini or a local model.
OpenAI may well ship another browser one day. I’d wait a while before moving in.