Comparison
Best AI agent for research in 2026
There is no single best AI agent for research. ChatGPT Deep Research writes a cited report; OpenAI does not publish a per-plan task count. Gemini Deep Research is in the Gemini app for people 18 and over, with higher limits on Pro and Ultra. Gemini Notebook (formerly NotebookLM) has a free Standard tier at 100 notebooks and 50 sources. Perplexity cites retrieved pages, and Teammates are a Max-only research preview on the web.
Last verified November 8, 2026. Cells are licence, list price, and platform from official pages. This is not a quality ranking.
Key takeaways
- A deep-research report is not the same as a notebook of sources. Gemini ships both, under different names.
- OpenAI does not publish Deep Research task counts; the in-product counter is the figure it tells you to use.
- The table lists licence, list price, and platform from official pages. It does not rank quality.
Last verified November 2026
Which AI agent is best for research in 2026?
There is no single best AI agent for research. ChatGPT Deep Research writes a cited report; OpenAI does not publish a per-plan task count. Gemini Deep Research is in the Gemini app for people 18 and over. Gemini Notebook (formerly NotebookLM) has a free Standard tier at 100 notebooks and 50 sources. Perplexity cites retrieved pages, and Teammates are a Max-only research preview on the web.
Fetching sources into the prompt is RAG. The shelf is Best AI agents.
What is the difference between a deep-research report and a notebook?
A Deep Research run in ChatGPT or Gemini starts from a question, proposes a plan, and returns a cited report. A Gemini Notebook holds a capped set of sources you chose, then you chat over that set. They are different jobs. This table lists both because Google ships both.
How do research agents compare on reports and price?
The table lists 4 research products with a Best for label, licence, list price, and whether you get a report or a notebook, from official pages last verified November 2026.
Sort any column. A blank would mean the official page did not state the fact. Source numbers match the list at the end of the page. Last verified November 8, 2026. The shelf for this table is Best AI agents.
- ChatGPT Deep Research
- Gemini Deep Research
- Gemini Notebook
- Perplexity
| ChatGPT Deep Research | OpenAI | A cited report in ChatGPT | Proprietary product | Limited on Free and Go; expanded on Plus $20/mo; maximum on Pro from $100/mo. No published task count. | ChatGPT; download reports as Markdown, Word, or PDF | [1] [2] [6] |
| Gemini Deep Research | A Gemini research report | Proprietary product | In the Gemini app (18+); higher daily limits on Google AI Pro and Ultra. Plus is $4.99/mo (listing, 3 Nov 2026) | Gemini app; optional Gmail, Drive, uploads, and Notebook sources | [3] [7] | |
| Gemini Notebook | A notebook capped by sources | Proprietary product | Standard free: 100 notebooks, 50 sources. Plus/Pro/Ultra via Google AI plans | Gemini Notebook (formerly NotebookLM) in the browser | [4] | |
| Perplexity | Perplexity AI | Cited answers and Max Teammates | Proprietary product | Free $0; $17/mo and $167/mo billed annually. Teammates: individual Max, web preview (listing, 7 Nov 2026) | Perplexity web; Teammates research preview on web | [5] |
Which AI agent is best for each research job?
ChatGPT Deep Research fits a cited report in ChatGPT; Gemini Deep Research fits a Gemini report; Gemini Notebook fits a source-capped notebook; Perplexity fits cited answers and Max Teammates.
These are job-fit notes from the documented scope, not scores.
Best for a cited ChatGPT report
OpenAI’s Deep Research help article says you describe the outcome, review a plan, and get a structured report with citations. The pricing page labels Deep Research Limited on Free and Go, and included on Plus and Pro, without a published task count.
Best for a free notebook of sources
Google’s Gemini Notebook plans page lists Standard at 100 notebooks and 50 sources per notebook, free with a Gmail account. Plus, Pro, and Ultra raise those caps through Google AI plans.
Best for ongoing Perplexity work
Perplexity Teammates are a research preview for individual Max subscribers on the web. Enterprise Pro and Enterprise Max are not included by default.
How was this research-agent comparison checked?
Every cell comes from an official product page, a help article, or a listing on this site that already cites that official page.
Prices are list prices with the billing unit the vendor printed. Licences are the SPDX or file name on the repository, not a guess. This page does not invent ratings, traffic, or a composite score, and it does not treat benchmark percentages from different tasks as one experiment.
What else do people ask about AI research agents?
These short answers cover Free limits, NotebookLM, Teammates, and ratings.
How many ChatGPT Deep Research tasks do I get?
OpenAI does not publish a number. The help article says your in-product counter shows remaining tasks, and that a fixed monthly allowance resets every 30 days from first use. The pricing page labels Deep Research Limited on Free and Go.
Is NotebookLM still a separate product?
Google’s plans page now calls it Gemini Notebook. Standard is free at 100 notebooks and 50 sources. Plus, Pro, and Ultra are Google AI plans, not a standalone NotebookLM subscription.
Who can use Perplexity Teammates?
Perplexity’s help article, read November 7, 2026, says the research preview requires an individual Max subscription and is on the web. Enterprise Pro and Enterprise Max are not included by default.
Why are there no star ratings?
This page copies licence, list price, and platform from official pages. It does not invent a quality score.
Sources
- 1OpenAI Help Center, Deep research in ChatGPT
- 2ChatGPT, Plans and pricing
- 3Gemini Apps Help, Use Deep Research in Gemini Apps
- 4Gemini Notebook Help, Learn about Gemini Notebook’s plans
- 5AI Agents Info, Perplexity listing (Teammates, checked November 7, 2026)
- 6AI Agents Info, Codex listing (ChatGPT plan dollars, checked November 6, 2026)
- 7AI Agents Info, Gemini listing (checked November 3, 2026)
Cite or embed this
The citation names this page and the date above. The embed is a blockquote with a link back here.
Citation
AI Agents Info. "Best AI agent for research." Last verified November 2026. https://www.aiagentsinfo.com/best/ai-agents-for-research.
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<blockquote cite="https://www.aiagentsinfo.com/best/ai-agents-for-research"> <p>There is no single best AI agent for research. ChatGPT Deep Research writes a cited report; OpenAI does not publish a per-plan task count. Gemini Deep Research is in the Gemini app for people 18 and over, with higher limits on Pro and Ultra. Gemini Notebook (formerly NotebookLM) has a free Standard tier at 100 notebooks and 50 sources. Perplexity cites retrieved pages, and Teammates are a Max-only research preview on the web.</p> <footer><a href="https://www.aiagentsinfo.com/best/ai-agents-for-research">Best AI agent for research</a>, AI Agents Info, last verified November 2026.</footer> </blockquote>