In this guide · 7 sections
Short answer
Both produce cited reports. ChatGPT can restrict research to sites you choose and exports to Word, PDF or Markdown. Gemini searches Google by default, adds Gmail, Drive and NotebookLM sources and runs inside Workspace apps. Neither replaces checking the sources.
ChatGPT vs Gemini Deep Research at a glance
We have not run our own benchmark. The comparison below is from OpenAI's deep research help article and Google's Use Deep Research in Gemini Apps page, read on 21 October 2026.
ChatGPT deep research
Source controlPlus US$20/mo; Business US$20/user/mo annual
- Searches the public web and your uploaded files
- Restrict to chosen sites, or prioritise them and allow full web
- Can read from connected apps such as Google Drive or SharePoint where enabled
- Report view with table of contents, sources used and activity history
- Download as Markdown, Word or PDF
Best for: Reports where you want to control exactly which sources are used.
Gemini Deep Research
Google ecosystemGoogle AI Pro S$28.99/mo; Workspace plans for work accounts
- Google Search on by default, can be switched off
- Add Gmail, Drive, uploaded files and NotebookLM notebooks
- Runs inside Docs, Gmail, Sheets, Slides, Drive and Chat on eligible Workspace plans
- Usually 5 to 10 minutes per report, per Google
- Ultra plan reports can include charts and visuals
Best for: Teams already working in Google Workspace and Drive.
Prices are approximate, as of October 2026, from OpenAI's ChatGPT pricing page and Google's Singapore Google AI plans page. Business plan prices exclude GST.
Plan limits: how many reports you get
Neither vendor publishes a fixed number of reports per plan on its main pages. What they do say:
| Plan | Deep research access | How limits work |
|---|---|---|
| ChatGPT Free and Go (US$8) | Limited | In-product counter shows remaining tasks; fixed allowances reset every 30 days from first use |
| ChatGPT Plus (US$20) | Expanded | Same counter |
| ChatGPT Pro (from US$100) | Maximum | Same counter |
| Gemini without a plan | Available, standard limits | Daily request limits; may be unavailable at peak demand |
| Google AI Plus / Pro | Higher limits (2x / 4x standard) | Deep Research counts as high usage; Pro can use the Pro model for reports |
| Google AI Ultra | 5x or 20x AI Pro limits | Reports may include charts and interactive visuals |
OpenAI also says deep research is not available in every country and depends on your plan. Google notes that limits may change without notice, including for capacity reasons. If research reports are central to someone's job, budget for a paid plan rather than relying on free tiers.
Sources and citations: what each one reads
The quality of a research report depends mostly on which sources it reads. The two tools take different approaches:
- ChatGPT creates a research plan you can edit, then lets you follow progress and interrupt to change focus or sources. Under Sites, Manage sites, you can restrict research to domains you enter (for example gov.sg agencies and a few trade bodies) or prioritise them while still searching the wider web.
- Gemini also shows a research plan you can edit before starting. Google Search is included by default; you can deselect it to research only your own selected sources, such as Gmail, Drive or uploaded files.
Both vendors say outputs include citations or source links. That is not the same as being correct: a citation can point to an outdated page, a page that says something slightly different, or a low-quality blog. Our guide on AI hallucinations and business risk explains why this happens.
Exporting and sharing reports
For client work, how the report leaves the tool matters as much as what is in it.
ChatGPT deep research
- Fullscreen report view with table of contents
- Sources used section for reference checking
- Download as Markdown, Word or PDF
- Results follow the chat's retention settings; deleting the chat deletes the report
Gemini Deep Research
- Report stays in the Gemini chat under Recent
- Can be turned into a custom visual with Canvas
- In Workspace apps, reports can also be found in Drive
- Share, export or copy options from the report view
If you prefer to research only from documents you have collected yourself, Google's NotebookLM is a different tool for that job; see our NotebookLM for business guide. For quick fact-finding rather than long reports, see Perplexity vs ChatGPT search for business research.
A fact-check routine before a report reaches a client
Treat a deep research report as a first draft by a fast junior researcher. This routine takes 30 to 60 minutes for a typical report:
Check every number against its source
Open the cited page for each statistic, price or date. Delete any figure you cannot find on the page it cites.
Check the date of each source
Market sizes, regulations and prices change. Prefer sources from the last 12 months and official pages for rules.
Replace weak sources
Swap blogs and content farms for primary sources: government agencies, company filings, vendor pricing pages, trade associations.
Look for what is missing
Ask: which competitors or risks did it not mention? Run a second, narrower research task on the gaps.
Rewrite the conclusions yourself
Keep the facts you verified and write the recommendation in your own words, so it reflects your judgement and you can defend it.
Label AI assistance where it matters
If a client contract or your own policy requires it, say the research was AI-assisted and human-checked.
To compare the tools on your own work, run the same question through both, with the same instructions, then score each report on accuracy of five random claims, source quality and gaps. That is a more useful test than any general benchmark.
Do it yourself or get help?
Either tool is easy to start with. The risk is not the software but staff sending AI-written research to clients without checking it, or pasting confidential documents into personal accounts.
IT Sorted is a Singapore-based team of developers with over 10 years of experience. Our Security Awareness Training (S$390) sets up a training platform in your account with a 12-month plan of 5-minute lessons, completion tracking and reminders, and a recorded walkthrough for new joiners. Pair it with an AI use policy so staff know which AI accounts to use and how to check AI research before it goes out.
Frequently asked questions
Neither is better for every task, and we have not run our own benchmark. ChatGPT gives tighter control over which websites are searched and exports to Word, PDF or Markdown. Gemini suits teams working in Google Workspace, with Gmail, Drive and NotebookLM as sources. Test both on the same question from your own work.
Neither vendor publishes a fixed number on its main pages. OpenAI says limits vary by plan, from limited on Free and Go to maximum on Pro, with an in-product counter. Google sets daily limits, with Google AI Pro at four times standard usage, and Deep Research counts as high usage.
Yes, if your account has access. In Gemini Apps you can add Gmail and Drive as sources once Google Workspace is connected, and Deep Research also runs inside Docs, Gmail, Sheets, Slides and Drive for work accounts on eligible Google Workspace plans. Your administrator controls whether it is available.
Yes. OpenAI's help article says completed deep research reports can be downloaded in several formats, including Markdown, Word and PDF. The report view also has a table of contents, a sources used section and an activity history showing how the research progressed.
They make checking possible, but they are not proof. A cited page can be out of date, say something slightly different from the summary, or be a weak source. Open each cited page for every number or claim you rely on, and replace weak sources with official or primary ones before sharing.