Gemini Notebook (formerly NotebookLM)
A source-grounded research notebook for querying a selected set of documents and web sources.
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What to know before choosing
Good fit
Summarizing an approved packet and locating cited passages for a draft, course outline, or evidence review.
Limits and trade-offs
It can use only sources that can be added and accessed, and source types, file sizes, and plan quotas apply. Citations help readers inspect passages but do not guarantee that the model interpreted them correctly.
Plans and free allowances
Standard is available free with a Gmail account; expanded limits are tied to Google AI plans, qualifying Workspace editions, or Google Cloud access. Google One currently shows Google AI Pro at $19.99/month with expanded Gemini Notebook access, but this is a bundled plan, not a NotebookLM-only subscription; the reviewed page displays a dollar sign without a currency code.
Evidence
Official product homepage ↗ (reviewed 2026-10-15), Official help: chat and citations ↗ (reviewed 2026-10-15), Official help: supported sources and limits ↗ (reviewed 2026-10-15), Official help: plan access and limits ↗ (reviewed 2026-10-15), Official Google One plan pricing ↗ (reviewed 2026-10-15)
Official published documentation reviewed; not a product test. Last source review is not a date of product testing.
A closer look at Gemini Notebook (formerly NotebookLM)
Google's Gemini Notebook, formerly known as NotebookLM, is a source-grounded research notebook. Add a focused set of accessible materials, ask questions against those sources, and inspect cited passages before reusing claims.
Editorial guidance based on published documentation. The workflow below is a suggested starting point, not a measured product result.
When to choose Gemini Notebook (formerly NotebookLM)
- Summarizing an approved packet of PDFs, Docs, slides, or web pages before drafting.
- Comparing statements across a source collection and jumping to cited passages for review.
- Building a lesson or article outline from supplied reference material.
When to choose something else
- Finding current web facts without adding up-to-date sources to the notebook.
- Extracting every chart, footnote, comment, or feature from arbitrary uploads.
- Treating cited AI answers as error-free or as a substitute for expert review.
A practical starting workflow
- Create a separate notebook for one project and add only material you have permission to use.
- Use supported, accessible sources and keep titles clear enough to identify in questions.
- Ask for a claim, source name, and quoted passage instead of a broad summary alone.
- Open citations in context and compare names, figures, dates, and qualifications with the original.
- Keep unsupported or conflicting statements out of the draft until resolved.
Check before committing
- The free plan currently lists up to 100 notebooks and 50 sources per notebook; each source has its own size limit.
- The help page lists supported source types but does not promise that every upload or URL will import or parse completely.
- Citations help review accuracy but do not guarantee a correct interpretation.
- The mobile app may have feature limitations; higher limits depend on region and account plan.
Common questions
Is NotebookLM still the product's official name?
Google's current product site and help pages use the name Gemini Notebook. Existing NotebookLM links redirect to that product site.
Official product homepage ↗ · Official help: chat and citations ↗
What can I add as a source?
The help page lists supported formats and sources such as PDFs, Google Docs and Slides, audio, text, web URLs, and public YouTube URLs. This is not a guarantee that every file will import successfully.
Do source citations guarantee a correct answer?
No. Open the cited passage and inspect it in context; verify important facts and interpretations against the original.
Compare approaches for this task
- Perplexity — Finding source leads for changing topics, then checking the original pages before drafting a comparison or brief.
- Notion AI — Teams already using Notion who want to search workspace context, draft or revise pages, summarize meetings, and turn notes into structured databases or actions.
- ChatGPT — Turning a brief or source files into structured drafts, explanations, and working documents.