Side-by-side comparison · AI Browsers & Agents
ChatGPT Work vs Dia vs Comet
Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.
Comparing 3 tools, the maximum.
At a glance
Pick it if: ChatGPT users who want admin, inbox, research and reporting jobs done for them without building automations.
Pick it if: Office workers and teams who live in Slack, Gmail and Atlassian tools and want their browser to pull it all together.
Pick it if: Anyone who researches, compares or reads a lot online and wants an AI helper in the browser without paying for it.
Overview
| Attribute | ChatGPT Work | Dia | Comet |
|---|---|---|---|
| In one line | ChatGPT's agent mode: hand it a whole task across your email, apps, files and browser. | A work browser from the makers of Arc that answers questions from your tabs and apps. | Perplexity's free web browser with an assistant that reads your tabs and does tasks. |
| Pricing model | Freemium | Freemium | Freemium |
| Starting price | $20/mo | $10 to $20/mo (Dia's page shows both) | $5/mo |
| Free plan | Yes | Yes | Yes |
| Works with Claude Code | No | No | No |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | ChatGPT Work | Dia | Comet |
|---|---|---|---|
| Overall rating | 4.0Winner | 3.6 | 3.9 |
| Ease of useHow quickly someone non-technical gets value from it. | 4.0 | 4.5 | 4.5 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 4.5 | 3.5 | 4.0 |
| Output qualityHow good the results are before you fix them. | 4.0 | 4.0 | 3.5 |
| Value for moneyWhat you get for the price, including the free plan. | 4.0 | 2.5 | 4.0 |
| Speed & reliabilityHow fast it is and how often it falls over. | 3.5 | 3.5 | 3.5 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | ChatGPT Work | Dia | Comet |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | Yes | No | Yes |
| Desktop app | Yes | Yes | Yes |
| Browser extension | No | No | Yes |
| API access | No | No | No |
| Teams & business | |||
| Team workspace | Yes | Yes | Yes |
| Enterprise plan or SSO | Yes | Yes | Yes |
| Connects to other apps | Yes | Yes | Yes |
| Open source or self-hosted | No | No | No |
| AI abilities | |||
| Works with your files | Yes | Yes | Yes |
| Understands images | Yes | Yes | Yes |
| Makes images | Yes | No | No |
| Makes video | No | No | No |
| Writes code | Yes | No | No |
| Runs agents or automations | Yes | No | Yes |
| Learns your brand or style | No | No | No |
| Works in many languages | Yes | Yes | Yes |
| Capabilities score | 12/ 17 | 8/ 17 | 11/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | ChatGPT Work | Dia | Comet |
|---|---|---|---|
| Plans | Free Free Trying a task or two on desktop. | Better Browser Free People who want a tidy browser without AI. | FreeOur pick Free Everyday browsing with an assistant for summaries and questions. |
PlusOur pick $20/mo Handing off a few jobs a week. | Better AnswersOur pick $10 to $20/mo (Dia's page shows both) Anyone who wants the AI chat day to day. | Comet Plus $5/mo Readers who want partner publishers' paywalled articles. | |
Pro From $100/mo Anyone running agent tasks every day. | Better Days $100/mo Heavy users who want the full workday assistant. | Perplexity Pro $20/mo, or $200/yr Anyone who wants the agent to do tasks for them. | |
Business See website Teams that want shared admin and no training on their data. | Dia for Work See website Companies rolling it out to staff. | Perplexity Max $200/mo, or $2,000/yr Heavy users running many tasks in the background. | |
| Which plan to pick | Try it on Plus with a couple of real jobs. If you hand it work most days you'll run out of credits, and that's when Pro or extra credits make sense. | Use the 14-day trial properly, then decide if the chat alone is worth $20 a month to you. Better Days at $100 only makes sense if the Morning Brief and meeting prep save you real time every day. Existing users keep their free AI for now, with 30 days' notice before that changes, and Windows users aren't on the paid plans yet. | Use it free: the sidebar assistant alone is worth having, and most people never need more. Pro makes sense if you want Perplexity's research tools anyway, but don't buy it just for the browser agent, since Pro's credits are a one-off bundle. Nobody needs Max just for the browser. |
Key features
| Attribute | ChatGPT Work | Dia | Comet |
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Pros and cons
| Attribute | ChatGPT Work | Dia | Comet |
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Who each one is for
| Attribute | ChatGPT Work | Dia | Comet |
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Questions people ask
Which is better, ChatGPT Work, Dia or Comet?
ChatGPT Work scores highest overall in our ratings (ChatGPT Work 4.0/5, Dia 3.6/5 and Comet 3.9/5). ChatGPT Work is best for sorting inbox and calendar admin across connected apps and weekly reports and reviews on a schedule. Dia is best for asking questions across several open tabs and A morning summary of calendar, email and tasks. Comet is best for summarising long pages, PDFs and videos and comparing products or suppliers across tabs.
Which is cheaper, ChatGPT Work, Dia or Comet?
ChatGPT Work: There's a free plan, and paid plans start at $20/mo. Dia: There's a free plan, and paid plans start at $10 to $20/mo (Dia's page shows both). Comet: There's a free plan, and paid plans start at $5/mo.
How we compare
Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.
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