Reviewed by Harsh Desai · Last reviewed:
Atlas
OpenAI's macOS browser with a built-in ChatGPT sidebar and autonomous Agent Mode
Best for
Atlas is OpenAI's first browser, built on Chromium and shipped on macOS in October 2025. It pairs a persistent ChatGPT sidebar with an Agent Mode that takes the keyboard from you and works the page on your behalf. The browser is free with any ChatGPT account, and the headline Agent Mode feature is gated to ChatGPT Plus, Pro, and Business plans.
What Atlas does:
- •Sidebar ChatGPT a persistent chat panel that already knows what tab you are on, so you can ask "summarise this page" or "compare the pricing on these three tabs" without copy-pasting URLs.
- •Agent Mode hand the cursor to ChatGPT and let it click, scroll, log in (with permission), book appointments, fill forms, and stitch together multi-step tasks across many tabs while you watch.
- •Browser memories opt-in long-term memory of what you have read, searched and asked about, so follow-up questions a week later still have context.
- •Page-aware Q&A ChatGPT can quote from the article you are reading, including paywalled pages you have legitimate access to, without leaving the tab.
- •Automatic page summaries one click turns any long article, research paper, or product comparison into a tight summary in the sidebar.
- •Form-fill and repetitive task automation Agent Mode handles bookings, expense submissions, travel checkouts, and similar drudgery that would normally eat 20 minutes.
- •Cross-tab research compare specs, prices, or reviews across many open tabs in one prompt instead of jumping between windows.
- •Standard Chromium browsing bookmarks, extensions, devtools, and password autofill all work as expected, so it is a usable daily browser even with the AI features off.
- •OpenAI account integration the same login that powers ChatGPT, Codex, and Sora carries your subscription tier into the browser, no separate account or API key needed.
- •Free tier on day one usable on any free ChatGPT account; only Agent Mode requires a paid plan.
Pricing:
- •Free $0 -- browser plus sidebar ChatGPT on a free OpenAI account; Agent Mode is hidden behind the paywall.
- •ChatGPT Plus $20/month -- unlocks Agent Mode plus the standard Plus benefits (GPT-5, longer memory, image and Sora generation).
- •ChatGPT Business $25/user/month -- Agent Mode for teams with shared workspace controls, admin console, and SSO.
- •ChatGPT Pro $200/month -- highest Agent Mode rate limits, priority access to new browser features, and the strongest reasoning models for heavy research.
Limitations:
- •macOS Apple Silicon only no Windows, Linux, iOS, or Android build at launch, and Intel-based Macs are excluded as well.
- •Agent Mode is slow and brittle multi-tab agent runs can take 2-3 minutes for what should be a 30-second click path, and the agent occasionally loops or claims a step is done when it has not actually completed it.
- •No publicly documented browser API there is no developer-facing automation API for Atlas itself, so you cannot script the browser the way you can with Chrome's DevTools Protocol or Playwright.
Our Verdict
Atlas earns 8/10 because OpenAI shipped a credible Chromium browser with the cleanest ChatGPT integration on the market and a working agent that actually drives a real browser, not a sandbox. The free tier is genuinely useful on day one, and for anyone already paying for ChatGPT Plus the upgrade to a sidebar that knows your current tab is a clear quality-of-life win.
For the Basic User, the sidebar ChatGPT is the only feature that matters and it is free. Open Atlas, click the chat panel, and ask plain-English questions about whatever page is open. There is no setup, no extensions to wire up, no API keys, and the experience is identical to ChatGPT.com but without the copy-paste-the-URL dance.
For the Vibe Builder, Atlas is the cheapest path to an always-on AI research and form-filling assistant. Drop a Plus subscription you may already pay for into a real browser, and travel bookings, competitor research, and routine multi-tab comparisons drop from a 30-minute slog to a single prompt. The free tier alone replaces a stack of summariser and read-it-later extensions.
Skip it if you are on Windows, Linux, or an Intel Mac, or if you live inside Perplexity for live information lookups: try Comet by Perplexity for real-time research with a faster agent, or consider Dia by The Browser Company if you want a more workflow-focused AI browser. Both ship on more platforms than Atlas does today.
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Frequently Asked Questions
How much does ChatGPT Atlas cost?
The browser is free to download and use with any ChatGPT account, including the free tier. Agent Mode, the autonomous task feature, requires a paid ChatGPT Plus plan at $20/month, ChatGPT Pro at $200/month, or a Business seat at $25/user/month. There is no separate Atlas subscription in 2026.
ChatGPT Atlas vs Perplexity Comet: which should I pick?
Choose Atlas when you already pay for ChatGPT and want the tightest sidebar integration on a Mac. Choose Comet when you need Windows or mobile support, faster live-information lookups, or a more reliable agent for multi-step tasks. Comet's agent currently completes complex flows that still trip Atlas up.
Does ChatGPT Atlas work on Windows or mobile?
Not in 2026. OpenAI shipped Atlas only for macOS on Apple Silicon (M1 chip or newer) at launch. There is no Windows, Linux, iOS, or Android version yet, and Intel-based Macs are not supported. If you need cross-platform reach today, Comet by Perplexity is the only AI browser shipping on Windows and mobile.
What is Agent Mode in ChatGPT Atlas?
Agent Mode lets ChatGPT take control of the browser and complete multi-step tasks for you, like researching products across tabs, booking appointments, or filling expense forms. It is gated to paid ChatGPT plans. Best for simple, repeatable tasks; complex flows can take minutes and occasionally stall mid-step.
Is ChatGPT Atlas safe to use for sensitive browsing?
Atlas is built on Chromium and follows the same sandboxing model as Chrome. Browser memories and Agent Mode are opt-in, and OpenAI keeps standard ChatGPT data controls. Avoid letting Agent Mode handle banking, healthcare, or other high-stakes tasks until the agent reliability matures past its 2026 launch quirks.
Is Atlas free?
Yes, Atlas offers a free version. Paid plans start at $8/month.
Who should use Atlas?
Atlas is built for vibe builders who want AI to handle the technical work and everyday users who need simple AI-powered tools. Common use cases include ai-browsing, page-summarization, web-research, task-automation, form-filling, multi-tab-research.
What are the best alternatives to Atlas?
Popular alternatives to Atlas include Chatgpt, Codex, Cursor. Compare features and pricing in our Agentic Browsers directory to compare options.
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Atlas
Free tier available