Why Atlas is being shut down

OpenAI's decision to retire Atlas stems from several factors that emerged quickly after its debut:

• Mac-only limitation. Atlas never received versions for Windows, iOS, or Android, capping its potential user base from the start .
• Poor performance. The browser's agent mode was notably slow — one test documented it taking ten minutes to add three items to an Amazon shopping cart .
• Security vulnerabilities. Within days of launch, security researchers at LayerX demonstrated prompt-injection attacks that could hijack the AI assistant by embedding malicious instructions inside URLs . NeuralTrust later documented an omnibox prompt-injection flaw, and other researchers reported exposed Mojo IPC bindings and unencrypted OAuth token storage . OpenAI acknowledged prompt injection as a core risk, publishing its own work on hardening Atlas against such attacks, but the fundamental vulnerability class remained .
• Strategic pivot. As OpenAI's applications CEO Fidji Simo told the team to cut back on "side quests," the company concluded that agentic browsing capabilities "didn't need a browser to work," in the words of OpenAI's James Sun .

Data migration: what does and does not transfer

No browser data moves automatically. OpenAI's support page is direct: bookmarks, open tabs, browsing history, cookies, and saved passwords all need manual intervention before August 9 . The only data that carries over without effort is your ChatGPT conversation history, which is stored in your OpenAI account, not inside the Atlas browser .

Here is the full breakdown of each data type and the action required:

• Bookmarks. Do not transfer automatically . Open Atlas's Bookmark Manager, export bookmarks as an HTML file, then import that file into Chrome or another major browser .
• Open tabs. Do not transfer automatically . Bookmark each important page individually, copy URLs into a document, or use a tab-saving browser extension. No bulk export option exists .
• Browsing history. Do not transfer automatically . Not portable. Screenshot or note any pages you need to revisit before the shutdown.
• Cookies and active sessions. Cannot be imported into another browser. OpenAI's help center states "cookies and active sessions cannot be imported" . You must re-authenticate on every site after switching browsers. Atlas will provide export options where available, but these cannot be consumed by other browsers .
• Saved passwords and logins. Do not transfer automatically . Check Atlas's password manager and manually record or export credentials before the deadline.
• ChatGPT conversation history. Transfers automatically — stored in your OpenAI account, not in the Atlas browser itself .

Step-by-step checklist

1. Export bookmarks. Open Atlas → Bookmark Manager → Export as HTML file → save to your computer .
2. Save open tabs. Copy important URLs into a notes app or use a tab-saving extension before the deadline .
3. Record passwords. Review saved credentials in Atlas's password manager and migrate them to your new browser's password manager .
4. Expect re-authentication. Log out of active sessions manually if you want clean disconnects. After shutdown, cookies will not survive the transition, and you will need to sign in again everywhere .
5. Uninstall Atlas (optional). After August 9, OpenAI says the app won't be deleted from your device, but it will stop working properly . Uninstall it to avoid confusion or accidental use.

What replaces Atlas: features moving to ChatGPT and Codex

OpenAI is not abandoning AI-powered browsing. Instead, it is redistributing the features tested in Atlas across existing products:

• ChatGPT desktop app (available for macOS and Windows). Receives agentic browsing capabilities including multi-tab support, file downloads, improved navigation, account login support, and other browser-like workflows built directly into the ChatGPT interface .
• ChatGPT Chrome extension. Provides AI-assisted browsing inside your existing Chrome browser, replacing Atlas's role as a standalone agent .
• ChatGPT Work. OpenAI's broader productivity suite that now houses enterprise-grade browsing agent features, announced alongside Atlas's deprecation .
• Codex. Absorbs developer-facing agentic capabilities such as automated web research, form filling, and workflow automation tasks that Atlas tested .

James Sun stated that "all these capabilities were built on what we learned from Atlas users who took a leap of faith on a new browser" .

Security risks if you keep using Atlas after August 9

Continuing to use Atlas past the shutdown date exposes you to several material risks:

• No more security patches. OpenAI explicitly warns that Atlas "will no longer push feature updates or fix security vulnerabilities" after August 9 . Any newly discovered Chromium-based exploits or AI-specific vulnerabilities will remain unpatched indefinitely.
• Known, unpatched prompt-injection flaw. Atlas already had a documented omnibox prompt-injection vulnerability where a malformed URL could hijack the AI agent . This and any related bugs will never be fixed.
• Browser may break completely. OpenAI warns that after the deadline, Atlas "may not open, browse, or support browser-based agentic workflows" . As websites update their standards and security protocols, an unmaintained browser will gradually stop working.
• Exposure for holdouts. OpenAI directly states it does "not want users to remain on a discontinued browser" and recommends moving to a supported alternative immediately . Any credentials or sessions left in Atlas could be at risk since the browser is effectively abandonware.

Bottom line

You have until Sunday, August 9, 2026, to export bookmarks (HTML file), save open tab URLs, manually record passwords, and accept that cookies and sessions will not transfer. After that date, Atlas becomes a security risk with no support, no patches, and potentially broken browsing. Switch to Chrome, the ChatGPT desktop app, or another supported browser before the deadline.

Why Atlas is being shut down

OpenAI's decision to retire Atlas stems from several factors that emerged quickly after its debut:

• Mac-only limitation. Atlas never received versions for Windows, iOS, or Android, capping its potential user base from the start .
• Poor performance. The browser's agent mode was notably slow — one test documented it taking ten minutes to add three items to an Amazon shopping cart .
• Security vulnerabilities. Within days of launch, security researchers at LayerX demonstrated prompt-injection attacks that could hijack the AI assistant by embedding malicious instructions inside URLs . NeuralTrust later documented an omnibox prompt-injection flaw, and other researchers reported exposed Mojo IPC bindings and unencrypted OAuth token storage . OpenAI acknowledged prompt injection as a core risk, publishing its own work on hardening Atlas against such attacks, but the fundamental vulnerability class remained .
• Strategic pivot. As OpenAI's applications CEO Fidji Simo told the team to cut back on "side quests," the company concluded that agentic browsing capabilities "didn't need a browser to work," in the words of OpenAI's James Sun .

Data migration: what does and does not transfer

No browser data moves automatically. OpenAI's support page is direct: bookmarks, open tabs, browsing history, cookies, and saved passwords all need manual intervention before August 9 . The only data that carries over without effort is your ChatGPT conversation history, which is stored in your OpenAI account, not inside the Atlas browser .

Here is the full breakdown of each data type and the action required:

• Bookmarks. Do not transfer automatically . Open Atlas's Bookmark Manager, export bookmarks as an HTML file, then import that file into Chrome or another major browser .
• Open tabs. Do not transfer automatically . Bookmark each important page individually, copy URLs into a document, or use a tab-saving browser extension. No bulk export option exists .
• Browsing history. Do not transfer automatically . Not portable. Screenshot or note any pages you need to revisit before the shutdown.
• Cookies and active sessions. Cannot be imported into another browser. OpenAI's help center states "cookies and active sessions cannot be imported" . You must re-authenticate on every site after switching browsers. Atlas will provide export options where available, but these cannot be consumed by other browsers .
• Saved passwords and logins. Do not transfer automatically . Check Atlas's password manager and manually record or export credentials before the deadline.
• ChatGPT conversation history. Transfers automatically — stored in your OpenAI account, not in the Atlas browser itself .

Step-by-step checklist

1. Export bookmarks. Open Atlas → Bookmark Manager → Export as HTML file → save to your computer .
2. Save open tabs. Copy important URLs into a notes app or use a tab-saving extension before the deadline .
3. Record passwords. Review saved credentials in Atlas's password manager and migrate them to your new browser's password manager .
4. Expect re-authentication. Log out of active sessions manually if you want clean disconnects. After shutdown, cookies will not survive the transition, and you will need to sign in again everywhere .
5. Uninstall Atlas (optional). After August 9, OpenAI says the app won't be deleted from your device, but it will stop working properly . Uninstall it to avoid confusion or accidental use.

What replaces Atlas: features moving to ChatGPT and Codex

OpenAI is not abandoning AI-powered browsing. Instead, it is redistributing the features tested in Atlas across existing products:

• ChatGPT desktop app (available for macOS and Windows). Receives agentic browsing capabilities including multi-tab support, file downloads, improved navigation, account login support, and other browser-like workflows built directly into the ChatGPT interface .
• ChatGPT Chrome extension. Provides AI-assisted browsing inside your existing Chrome browser, replacing Atlas's role as a standalone agent .
• ChatGPT Work. OpenAI's broader productivity suite that now houses enterprise-grade browsing agent features, announced alongside Atlas's deprecation .
• Codex. Absorbs developer-facing agentic capabilities such as automated web research, form filling, and workflow automation tasks that Atlas tested .

James Sun stated that "all these capabilities were built on what we learned from Atlas users who took a leap of faith on a new browser" .

Security risks if you keep using Atlas after August 9

Continuing to use Atlas past the shutdown date exposes you to several material risks:

• No more security patches. OpenAI explicitly warns that Atlas "will no longer push feature updates or fix security vulnerabilities" after August 9 . Any newly discovered Chromium-based exploits or AI-specific vulnerabilities will remain unpatched indefinitely.
• Known, unpatched prompt-injection flaw. Atlas already had a documented omnibox prompt-injection vulnerability where a malformed URL could hijack the AI agent . This and any related bugs will never be fixed.
• Browser may break completely. OpenAI warns that after the deadline, Atlas "may not open, browse, or support browser-based agentic workflows" . As websites update their standards and security protocols, an unmaintained browser will gradually stop working.
• Exposure for holdouts. OpenAI directly states it does "not want users to remain on a discontinued browser" and recommends moving to a supported alternative immediately . Any credentials or sessions left in Atlas could be at risk since the browser is effectively abandonware.

Bottom line

You have until Sunday, August 9, 2026, to export bookmarks (HTML file), save open tab URLs, manually record passwords, and accept that cookies and sessions will not transfer. After that date, Atlas becomes a security risk with no support, no patches, and potentially broken browsing. Switch to Chrome, the ChatGPT desktop app, or another supported browser before the deadline.