Side-by-side comparison · AI Browsers & Agents
ChatGPT Work vs Firefox 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: Business owners who want a trusted, independent browser and want to decide for themselves whether AI is on or off.
Pick it if: Anyone who researches, compares or reads a lot online and wants an AI helper in the browser without paying for it.
ChatGPT Work scores highest overall, but Firefox gives you more for your money. Which one is right comes down to what you value most.
Overview
| Attribute | ChatGPT Work | Firefox | Comet |
|---|---|---|---|
| In one line | ChatGPT's agent mode: hand it a whole task across your email, apps, files and browser. | Mozilla's free browser with optional AI you can switch off with one setting. | Perplexity's free web browser with an assistant that reads your tabs and does tasks. |
| Pricing model | Freemium | Free | Freemium |
| Starting price | $20/mo | Free | $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 | Firefox | Comet |
|---|---|---|---|
| Overall rating | 4.0Winner | 3.6 | 3.9 |
| Ease of useHow quickly someone non-technical gets value from it. | 4.0 | 3.5 | 4.5 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 4.5 | 3.0 | 4.0 |
| Output qualityHow good the results are before you fix them. | 4.0 | 3.5 | 3.5 |
| Value for moneyWhat you get for the price, including the free plan. | 4.0 | 4.5 | 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 | Firefox | Comet |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | Yes | Yes | Yes |
| Desktop app | Yes | Yes | Yes |
| Browser extension | No | No | Yes |
| API access | No | No | No |
| Teams & business | |||
| Team workspace | Yes | No | 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 | No | Yes |
| Understands images | Yes | No | 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 | 6/ 17 | 11/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | ChatGPT Work | Firefox | Comet |
|---|---|---|---|
| Plans | Free Free Trying a task or two on desktop. | FirefoxOur pick Free Everyone, with AI on or off as you choose. | FreeOur pick Free Everyday browsing with an assistant for summaries and questions. |
PlusOur pick $20/mo Handing off a few jobs a week. | Smart Window beta Free Heavy researchers in the US, Canada or France. | Comet Plus $5/mo Readers who want partner publishers' paywalled articles. | |
Pro From $100/mo Anyone running agent tasks every day. | 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. | 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. | There's nothing to pay. Use the sidebar with whatever AI account you already have. If you're in the US, Canada or France, try Smart Window with a free Mozilla account. Everyone else can join the waitlist. | 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 | Firefox | Comet |
|---|---|---|---|
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Pros and cons
| Attribute | ChatGPT Work | Firefox | Comet |
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Who each one is for
| Attribute | ChatGPT Work | Firefox | Comet |
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Questions people ask
Which is better, ChatGPT Work, Firefox or Comet?
ChatGPT Work scores highest overall in our ratings (ChatGPT Work 4.0/5, Firefox 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. Firefox is best for Keeping AI out of the browser entirely and using your own ChatGPT or Claude in a sidebar. Comet is best for summarising long pages, PDFs and videos and comparing products or suppliers across tabs.
Which is cheaper, ChatGPT Work, Firefox or Comet?
ChatGPT Work: There's a free plan, and paid plans start at $20/mo. Firefox: It's free and open source. Comet: There's a free plan, and paid plans start at $5/mo.
Which is easier to use, ChatGPT Work, Firefox or Comet?
Comet rates highest for ease of use in our scores. Anyone who researches, compares or reads a lot online and wants an AI helper in the browser without paying for it.
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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