What is ChatGPT deep research, and when should you use it?

ChatGPT deep research is a feature that takes your question, spends several minutes searching and reading many online sources, and then writes a structured report with citations. It suits big questions that need evidence gathered from lots of places. For quick questions, an ordinary ChatGPT answer is faster and usually enough.

In this guide, you’ll learn how deep research differs from a normal answer, how to start one, and how to check what it hands back.

How is deep research different from an ordinary answer?

When you ask ChatGPT a question and it searches the web, it typically looks at a handful of pages and replies within seconds. That is ideal for “What time does the museum open?” or “Who won last night’s match?”

Deep research works more like a research assistant you send off for the afternoon. It makes a plan, searches, reads what it finds, searches again based on what it learned, and keeps going until it can write a proper report. A tool that works through several steps on its own like this, rather than replying once, is often called an AI agent.

	Ordinary answer	Deep research
Time	Seconds	Usually 5 to 30 minutes
Sources	A few pages, if it searches	Many sources, gathered in stages
Output	A conversational reply	A structured report with citations
Best for	Quick facts and everyday questions	Comparisons, overviews, and decisions

When is deep research worth using?

It earns its wait when the answer is scattered across many places and you want it pulled together. Good examples:

• Comparing three or four options before a big purchase, with the pros and cons of each
• Getting an overview of a topic you need to understand properly, such as a health condition you have been diagnosed with (as background, never as a replacement for your doctor)
• Researching a place before you move or travel there
• Gathering what is known about a question for a school project, a report at work, or a hobby

It is less useful for anything quick, anything opinion-based where there is no evidence to gather, or anything where you already know the one source you need.

How do you start a deep research task?

The exact buttons change from time to time, but the flow has stayed much the same.

1. Open ChatGPT and start a new chat.
2. Choose deep research from the tools menu, which at the time of writing sits behind the plus button beside the message box.
3. Describe what you want to find out and what you want the report to cover. Mention any sources you want it to use or avoid.
4. Answer any clarifying questions it asks. These shape the whole task, so it is worth giving full answers.
5. Review the research plan it proposes. You can adjust it before the research begins.
6. Let it run. You can watch its progress or step away and come back later.
7. Read the finished report, and open the sources behind any claim that matters to you.

OpenAI says deep research can also draw on files you give it and on apps you have connected to ChatGPT, not only the public web.

How many deep research tasks you can run depends on your plan, with paid plans getting more. ChatGPT shows a counter of how many you have left.

A prompt to try

A clear brief makes a far better report. Try adapting this one:

I want a research report on [your topic].

Background: [why you need this and what you already know]

Please cover:
- [the first thing you want to understand]
- [the second thing]
- [the third thing]

Prefer official sources, reputable news outlets, and published research.
Tell me where sources disagree, and flag anything you could not confirm.
Finish with a short plain-English summary of the key findings.

Why do you still need to check the sources?

A report with dozens of citations looks authoritative, and that is exactly why it is worth a second look. OpenAI’s own description of the feature says it can still make up facts or draw the wrong conclusions, and can struggle to tell reliable information from rumour. When AI states something false with confidence, that is called a hallucination.

A citation can also be real but not say what the report claims. So for any fact you plan to rely on, repeat, or act on:

• Click the link and find the sentence that supports the claim
• Check the date, as older pages can be out of date
• Ask whether the source is one you would trust if you had found it yourself

Our guide to fact-checking AI answers walks through this habit in more detail.

Next steps

If you are new to ChatGPT, start with how to use ChatGPT. To build good research habits that work in any AI tool, read how to use AI for research. Then pick a question you have been meaning to look into properly, and give deep research a clear brief.