ChatGPT Atlas Is Shutting Down on August 9. I Checked What's Actually Left.

OpenAI switches ChatGPT Atlas off on August 9, 2026. On August 3 its own update server still had a fresh build of the browser on the shelf: 270 MB, flagged as a critical update, with nothing in the feed to suggest it had a week left.

This is for anyone who put Atlas on their machine, used it, and now has a deadline. By the end you'll know which of the two alternatives everyone names you can install today, what doesn't travel with you, and which half of Atlas was actually free. That last one decides what the switch costs you, and it's the part I had wrong when I started.

The plan was to give all three the same task and print three sets of numbers. I got none of them, and the reason turned out to be worth more than the numbers.

The short version: what to do before August 9

Export your Atlas data this week, then install Perplexity Comet if you want a working AI browser today. OpenAI's wording is that Atlas "is scheduled to stop working on August 9, 2026", so treat it as a hard date. Comet is free and worldwide, on Mac, Windows, iOS and Android, no waitlist. Gemini in Chrome, the other name in every roundup, isn't listed for a single European Union country. And the agent capability people are mourning was never on the free plan anyway.

What OpenAI actually said, and what doesn't come with you

OpenAI is retiring the browser and keeping the capability, in its own words: "We're deprecating Atlas and moving browser-based agentic capabilities into ChatGPT and Codex." Agentic just means the assistant can take actions on a page for you, not only read it. For heavier work OpenAI points at the new ChatGPT desktop app, and for lighter help while you browse, at the ChatGPT Chrome extension or sidebar. I couldn't find a blog post about any of it: the announcement lives in a help center article and one release-notes entry, which is part of why people missed it.

The release notes are blunt about your data: "Atlas browser data, including bookmarks, open tabs, and browser history, will not transfer automatically. You can export your cookies and passwords to the ChatGPT desktop app and your bookmarks to Chrome."

Read that again with a browser agent in mind. Cookies and active sessions can't be imported into another browser at all, and logged-in sessions are exactly what an agent works with. The thing that made Atlas useful is the thing that doesn't move. Your ChatGPT chat history sits separately and stays, so it's the browser that empties out. Exporting the rest is a job you can finish in a day, and the only one with a real deadline.

Days before the shutdown, the Atlas update server was still handing out new builds

On August 3, 2026, OpenAI's public update feed for Atlas was still live and still serving a build published after the shutdown was announced. Atlas updates itself through Sparkle, the standard auto-update system for Mac apps, and Sparkle reads a public file called an appcast: a plain list of the versions on offer. Anyone can read it. So I did.

$ curl -s https://persistent.oaistatic.com/atlas/public/sparkle_public_appcast.xml
  <title>1.2026.189.1</title>
  <pubDate>Fri, 24 Jul 2026 20:45:29 +0000</pubDate>
  <sparkle:criticalUpdate/>
  ... 3 items total, all three flagged criticalUpdate

$ curl -sI .../ChatGPT_Atlas_Desktop_public_1.2026.189.1_20260724200710000.dmg
HTTP/2 200
content-length: 269967267
last-modified: Fri, 24 Jul 2026 21:12:42 GMT

Three versions, all three marked as a critical update, and the newest went up fifteen days after OpenAI announced on July 9 that the browser would stop working. The 270 MB installer behind it still answers with a 200. What isn't in that file is any notice at all: no end-of-life field, no message, nothing that tells a machine or a person that this browser stops working on August 9.

The copy on my own Mac is version 1.2025.344.9, built December 22, 2025, set to check every 3600 seconds. It last managed to ask on May 30, 2026, because Sparkle only checks while the app is open and I stopped opening it. If you're waiting for Atlas to warn you about your bookmarks, look at what you're waiting on.

I've shipped enough software to recognize what this is: somebody owned the announcement, and nobody owned the update feed.

Perplexity Comet: the one you can install today

Comet is the only one of the two named alternatives I can install today from the Netherlands, and it costs nothing to start. Perplexity's launch post is unambiguous: "Today we are releasing the Comet browser to the world, for free."

The paid layer is small and clearly stated. Comet Plus is "a $5 standalone subscription" in Perplexity's own words, included with Perplexity Pro at $20 a month and Max at $200 a month, as of August 2026. The catch on the free tier is a daily allowance of Pro Searches and Deep Research rather than unlimited agent work, so a long session runs out on you. Perplexity doesn't publish the number, so plan for a handful of heavy runs a day.

I did not install Comet on this machine for this article, and I'm not going to dress that up. What I can tell you comes from the day I ran three browser agents, Comet among them, on real errands, in I handed an AI browser agent my daily tasks. They handled the finding and comparing without much trouble, and I kept my own hand on every step that spent money.

Gemini in Chrome: not an option where I live

Gemini in Chrome is the second name on every alternatives list, and Google's own availability page, which I read on August 3, 2026, doesn't list a single European Union country. The United States is on it, and the United Kingdom, added July 14, 2026. The Netherlands, Germany, France and Spain are not. Google's requirement is that you be "in a supported region", and it adds: "We're gradually releasing Gemini in Chrome, so it might not be available to you just yet."

The agentic part is narrower still. Auto browse, the mode that works through multi-step chores and the only piece that does what the Atlas agent did, is "currently rolling out in preview in the U.S." per Google's own announcement, and only for Google AI Pro and Ultra subscribers. Pro runs $19.99 a month and Ultra starts at $99.99, as of August 2026. Google's July 30, 2026 post took AI Pro to more than 160 countries and still kept auto browse in the U.S. A subscription in Amsterdam buys plenty, and auto browse isn't part of it.

The free part of Atlas was the browser, not the agent

Atlas gave away the browser and never gave away the agent, and that split decides what this shutdown costs you. OpenAI's launch post from October 21, 2025 has both halves in it: "ChatGPT Atlas is launching worldwide on macOS today to Free, Plus, Pro, and Go users", and then "Agent mode in Atlas is available today in preview for Plus, Pro, and Business users." I read the whole run of the Atlas release notes, through the final entry on March 10, 2026, and no entry ever widens that second list. Every agent update in there is about behavior and bugs.

I had this one wrong when I started writing. The browser and the agent shipped on the same day and only one of them was the free half, which is an easy thing to blur.

Let's do the math on what it changes. If you used Atlas on the free plan, what you lose on August 9 is a free AI browser, and Comet replaces that for $0 the same afternoon. If you paid for agent mode, the gate barely moves: it was Plus, Pro and Business, and the successor, ChatGPT Work, goes to paid plans "except Free and Go" per the July 9, 2026 release notes. What changes is the shape of the tool, not the bill.

What our two Atlas tests still tell you

They tell you where a browser agent stops, and that line moves with you to whatever you install next, because the web drew it and not OpenAI. A day of ordinary errands drew it at the register: I stopped the agents before anything that spent money, because of prompt injection, where hidden instructions on a page get read by the agent as if you'd typed them.

Live job application forms drew the line at identity instead. A Greenhouse-hosted form had nine form controls: an agent can type into seven, one wants a file off your disk, and one is a hidden reCAPTCHA field that isn't a question at all, which is where an agent stops on a real application. Move to Comet next week and both lines land in exactly the same place.

Which ChatGPT Atlas alternative should you pick?

Pick Comet if you want an AI browser working today, and the ChatGPT desktop app if you're already wired into OpenAI on a paid plan. The whole field, as of August 2026.

Free-plan Atlas user doing light research: Comet is a straight swap and your bill stays at zero. Paying for agent mode: you're choosing between a ChatGPT plan and Comet's daily cap, and a feature table won't decide that for you. Your own usage will, which is step 3 below.

My honest take

The shutdown itself doesn't bother me. OpenAI built the agent capability, learned that people won't switch browsers to get it, and moved it to where those people already are. That's defensible, and expensive if you're the person who did switch.

What bothers me is the gap between how this reads in a roundup and how it reads on your invoice. Eight great alternatives, say the lists. Count the ones you can run, from where you live, at the price you were paying, and the list gets very short.

Bottom line: export this week, install Comet, and keep treating the agent as a researcher rather than a hand on your wallet.