TL;DR
ChatGPT Atlas launched in October 2025 and is being deprecated August 9, 2026, with OpenAI moving its agentic capabilities into ChatGPT Work and the new desktop app. Comet has since launched an enterprise product with MDM deployment, CrowdStrike security, and Microsoft 365 integration. This guide covers what each browser does, what changed in 2026, and what else enterprise teams should be evaluating now.
ChatGPT Atlas and Perplexity Comet launched weeks apart in 2025 and instantly became the reference comparison for AI-first browsers. Eight months later the comparison looks different. Atlas is being deprecated on August 9, 2026, with OpenAI moving its agentic capabilities into ChatGPT Work and the new desktop app. Comet has launched an enterprise product used by Fortune, AWS, and Bessemer Venture Partners. Claude for Chrome, Gemini in Chrome, and several other tools have entered the same space. This updated guide covers what each browser does, what has changed, and what enterprise teams should be evaluating in 2026.
What is ChatGPT Atlas? ChatGPT Atlas was OpenAI’s AI-first browser, launched October 21, 2025 for macOS. It embedded ChatGPT directly into every web page through a persistent sidebar, giving users access to the full power of ChatGPT without switching tabs or copy-pasting content.
Atlas was built for execution. The browser’s philosophy was that AI should not just answer questions but complete tasks. Agent Mode enabled ChatGPT to autonomously run multi-step workflows: find recipes, add items to a cart, complete a purchase, and schedule a meeting. Every action was logged with a stop control available at any point.
Key features: Agent Mode: Autonomous multi-step task execution across websites, available to Plus, Pro, and Business subscribersChatGPT Sidebar: Persistent access to ChatGPT on every page for summarization, drafting, comparison, and analysisBrowser Memory: Continuous context across sessions. The browser recalled past interactions and offered personalized suggestions automaticallyCursor Chat: Direct text editing inside forms and fields without switching to another toolPrivacy Controls: Full memory management with options to clear or limit what Atlas retained
Source: Openai What Changed: Atlas Deprecated August 9, 2026 OpenAI announced on July 9, 2026 that Atlas would stop working on August 9, 2026 . The company is moving browser-based agentic capabilities into ChatGPT and Codex directly, building on what it learned from Atlas users. Capabilities moving into ChatGPT include multiple tabs, downloads, improved navigation, and account login support.
For Atlas users: bookmarks, open tabs, and browser history do not transfer automatically. Export bookmarks as an HTML file before the deadline. Cookies and session files should be treated as sensitive data. ChatGPT conversation history remains available separately.
For enterprise teams that valued Atlas for task automation: those capabilities are moving into ChatGPT Enterprise, which in 2026 includes dedicated instance options, longer-context capabilities, and compliance logging.
What is Perplexity Comet? Perplexity Comet is a Chromium-based AI browser built around Perplexity’s Answer Engine. Every tab has a built-in AI assistant that provides cited, real-time answers before traditional search results appear. Users can highlight any text on a page to get instant explanations, ask follow-up questions in context, and organize tabs into persistent workspaces by project or research topic.
Where Atlas was built for action, Comet was built for understanding. Every answer comes with full source citations. Users can verify claims, trace information back to its origin, and build research trails rather than just completing tasks.
Comet is available free on Mac, Windows, iOS, Android, and visionOS. Paid plans start at $5 per month for Comet Plus, with Pro at $20 per month and Max at $200 per month.
Image Source: Perplexity Key features: Chrome Extension Compatibility: Works alongside existing browser setups without requiring a full browser switchAI-Powered Personal Assistant: Comet’s assistant provides real-time, citation-grounded answers, content summaries, and context-aware guidance while browsing. Well suited to research-heavy workflows and knowledge-intensive tasksTask Automation: Comet can automate repetitive tasks including organizing tabs, scheduling appointments, and managing emails, with user approval required for sensitive actionsResearch Tools: Advanced capabilities including citation creation, note-taking, and document organization for thorough, well-documented researchPrivacy Features: Multiple data-tracking modes including a strict mode that processes sensitive tasks locally on the device
Tech publication TestingCatalog describes Comet as “a browser built for the curious mind,” noting that users reported a 25% increase in research efficiency when using its AI tools. Experts suggest that Comet’s focus on transparent sourcing and context-aware guidance makes it ideal for academics, analysts, and students.
Source: Perplexity What Changed: Comet in 2026 Comet Enterprise (March 2026) Comet Enterprise launched March 17, 2026. Companies including Fortune, AWS, AlixPartners, Gunderson Dettmer, and Bessemer Venture Partners are already using it. Features include:
MDM deployment for silent installation across all employee devices CrowdStrike Falcon integration for phishing detection, data leak prevention, and runtime monitoring Granular IT controls for managing how teams use AI within the browser Analytics APIs and custom credit limits per team
Microsoft 365 Integration Perplexity’s Computer workspace now integrates with Microsoft 365 applications, letting users run research and AI-assisted workflows inside the tools they already use.
Deep Research Upgrade Deep Research now runs on Claude Opus 4.6 for Max users and Claude Sonnet 4.6 for Pro users. It generates structured outputs directly, presentations, spreadsheets, dashboards, and websites, rather than returning text summaries only.
Model Council (Max Tier) Model Council runs Claude Opus 4.6, GPT-5.6 Sol, and Gemini 3.1 Pro in parallel on a single query and synthesizes their outputs. Designed for high-stakes research where cross-model verification reduces the risk of following one model’s error.
Platform Availability Comet is now available on macOS, Windows, iOS (launched March 2026), Android, and visionOS.
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ChatGPT Atlas vs Perplexity Comet: Key Differences Feature ChatGPT Atlas Perplexity Comet Current status Deprecated August 9, 2026 Active, expanding globally Core design Workflow automation and task execution Research, verification, citation-grounded answers Developer OpenAI Perplexity AI Launch date October 21, 2025 July 2025 AI integration ChatGPT sidebar with Agent Mode Answer Engine with Comet Assistant Enterprise offering Capabilities moving into ChatGPT Enterprise Comet Enterprise, MDM-deployable (March 2026) Task automation Multi-step agentic tasks, Agent Mode Multi-step tasks with user approval Source transparency Low, prioritizes workflow speed High, full citations on every answer Security Privacy controls, memory management CrowdStrike Falcon integration, strict privacy modes Microsoft 365 Via ChatGPT Enterprise connectors Native via Computer workspace Deep Research No equivalent Claude Opus 4.6 (Max), Sonnet 4.6 (Pro) Model Council No equivalent Three models in parallel (Max tier) Platforms macOS only at deprecation Mac, Windows, iOS, Android, visionOS Pricing Free tiers; premium for Agent Mode Free, Plus ($5/mo), Pro ($20/mo), Max ($200/mo)
ChatGPT Atlas vs Perplexity Comet: Two Different Approaches to AI Browsing Smarter Task Management: ChatGPT Atlas Atlas was built for operational teams that wanted AI completing routine tasks with minimal human steps. Marketing teams drafting at speed, finance teams compiling reports, operations teams running multi-step processes. Its defining feature was Agent Mode: ask Atlas to complete a workflow and it would work through the steps autonomously, with the user in oversight rather than execution mode.
Those capabilities are not going away. OpenAI is folding what Atlas demonstrated into ChatGPT Enterprise and Codex, with dedicated instance options, longer-context capabilities, and compliance logging built in.
Research and Knowledge Management: Perplexity Comet Comet is built for knowledge-intensive teams where the source trail is part of the output. Legal teams reviewing contracts, consultants synthesizing market data, analysts preparing decision memos. Every answer comes with citations. Every claim is verifiable. The strict privacy mode processes sensitive tasks locally, which is a priority in regulated industries where data residency is a compliance obligation.
Users report up to 25% faster research workflows using Comet’s integrated tools. Comet Enterprise adds MDM deployment, CrowdStrike security integration, and Microsoft 365 connectivity that makes it deployable at enterprise scale.
What Else Is Gaining Ground in AI Browsing in 2026 The agentic browsing space has expanded well beyond the Atlas versus Comet comparison that defined late 2025. Six products are worth knowing about depending on what your team needs in 2026.
Opera Neon : at $19.90 per month is the power-user option, running on Gemini 3.1 Pro and GPT-5.6 for teams that want a browser agent that handles complex projects, manages parallel tasks, and can scaffold small web apps autonomouslyChatGPT Work : (launched July 9, 2026) is OpenAI’s direct replacement for what Atlas offered. An agent inside ChatGPT that takes an outcome, gathers context across connected apps, and returns finished materials: sheets, slides, docs, and web apps. Runs on GPT-5.6 Sol with Codex built in, shipping as part of the new unified ChatGPT desktop appClaude for Chrome : from Anthropic brings Claude’s reasoning directly into the browsing session as an extension. Teams get research, drafting, and analysis capabilities without switching browsers or migrating any existing setupGemini in Chrome : reaches the most users by a wide margin because it lives in the browser most of the world already uses. Free for Mac and Windows Chrome users since September 2025, with agentic tab-level capabilities still rolling outMicrosoft Edge with Copilot : connects to internal SharePoint, email, and Teams through its Work IQ layer. AI answers questions using internal company context, making it the natural choice for enterprises already on Microsoft 365Sigma Browser : is the strongest independent alternative to both Atlas and Comet: page-aware browsing, Deep Research, AI Chat, and local AI options that keep data on-device. Available on Windows and macOS without a subscription requirement
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FAQs
1. What is ChatGPT Atlas? ChatGPT Atlas was OpenAI’s AI-first browser, launched October 21, 2025 for macOS. It embedded ChatGPT directly into every webpage through a persistent sidebar, allowing users to summarize, draft, compare, and analyze content without leaving the page. Its defining feature was Agent Mode, which enabled ChatGPT to complete multi-step tasks autonomously including booking travel, making purchases, and compiling research. Atlas is being deprecated on August 9, 2026.
2. What is Perplexity Comet? Perplexity Comet is a Chromium-based AI browser built around Perplexity’s Answer Engine. Every tab has a built-in assistant that provides cited, real-time answers before traditional search results appear. Available free on Mac, Windows, iOS, Android, and visionOS, Comet is designed for research-intensive workflows where source verification is as important as speed. Comet Enterprise launched March 2026 for organizations needing MDM deployment and enterprise security controls.
3. What is the main difference between ChatGPT Atlas and Perplexity Comet? Atlas was built for automation: completing tasks, executing workflows, and acting on the web on behalf of the user. Comet was built for verification: providing cited, real-time answers with full source transparency. Atlas prioritized execution speed. Comet prioritizes information accuracy and the ability to trace every claim back to its source.
4. Is ChatGPT Atlas still available? ChatGPT Atlas is being deprecated on August 9, 2026, per OpenAI’s official announcement. OpenAI is moving its browser-based agentic capabilities into ChatGPT and Codex. Users should export bookmarks as an HTML file before the deadline. ChatGPT conversation history remains available separately and is unaffected by the shutdown.
5. Which AI browser should enterprises use in 2026? With Atlas deprecated, Comet is the only purpose-built AI browser in active development with a dedicated enterprise product. Comet Enterprise provides MDM deployment, CrowdStrike Falcon security integration, and Microsoft 365 connectivity. For task automation and operational workflows, OpenAI’s browser agentic capabilities are moving into ChatGPT Work and ChatGPT Enterprise rather than a standalone browser.
6. What is Comet Enterprise? Comet Enterprise is Perplexity’s enterprise AI browser, launched March 17, 2026. It includes silent MDM deployment across employee devices, CrowdStrike Falcon integration for phishing detection and data leak prevention, Microsoft 365 connectivity, granular IT controls, and analytics APIs with custom credit limits. Fortune, AWS, AlixPartners, Gunderson Dettmer, and Bessemer Venture Partners are documented enterprise users.
7. What replaced ChatGPT Atlas for task automation? OpenAI launched ChatGPT Work on July 9, 2026 as the direct replacement for Atlas’s automation capabilities. It is an agent inside ChatGPT that takes an outcome, gathers context across connected apps and workflows, and returns finished materials including sheets, slides, docs, and web apps. It runs on GPT-5.6 Sol with Codex built in and ships as part of the new unified ChatGPT desktop app.
8. What models does Perplexity Comet use in 2026? Comet Agent runs on Claude Sonnet 4.6 for Pro users and Claude Opus 4.6 for Max users. Model Council, a Max-tier feature, runs Claude Opus 4.6, GPT-5.6 Sol, and Gemini 3.1 Pro in parallel on a single query and synthesizes their outputs. Deep Research runs on Claude Opus 4.6 for Max subscribers and Sonnet 4.6 for Pro subscribers.
