What is NotebookLM?
NotebookLM is a Google AI research assistant that answers questions using only the sources you give it. Google renamed it Gemini Notebook on 16 July 2026, saying it remains a standalone product focused on research.
It works by building a notebook around your material. You add documents, links or recordings, then chat with the notebook. Answers are grounded in those sources and carry inline citations, so you can open the exact passage behind each claim.
Key Features
NotebookLM, now Gemini Notebook, answers questions from the sources you upload with inline citations and turns the same material into Audio Overviews, Video Overviews, mind maps, flashcards, quizzes, reports, infographics and slide decks.
- Grounded chat: Answers come from the sources in your notebook, and each one carries inline citations that open the exact passage behind the claim.
- Wide source support: Accepts PDFs, websites, YouTube videos, audio files, Google Docs and Google Slides, with up to 500,000 words per source or 200MB for a local upload.
- Audio Overviews: Turns your material into a podcast-style discussion you can listen to instead of reading.
- Video Overviews: Produces narrated explainers from the same sources.
- Study aids: Generates study guides, mind maps, flashcards and quizzes, which suits revision from lecture notes and readings.
- Documents: Creates briefings, reports, infographics and slide decks without leaving the notebook.
- Code execution: Writes and runs code on a secure cloud computer for data analysis grounded in your sources. Google released it to AI Ultra and eligible Workspace customers first, with Pro users on the web to follow.
- Gemini app sync: Since the rename, notebooks sync between the Gemini app and the standalone product, according to Google.
Pros
NotebookLM’s main advantages are answers you can check against cited passages, a free tier of 100 notebooks with 50 sources each, support for more than 80 languages and a stated policy of not training on your data.
- Checkable answers: Inline citations point to the source passage, so you can confirm a claim in one click instead of trusting the summary.
- Generous free tier: The free Standard tier allows up to 100 notebooks with 50 sources in each, according to the Google help centre.
- Large sources: A single source can hold up to 500,000 words or 200MB, enough for long reports, books and recordings.
- Many outputs from one upload: The same sources become audio, video, slides, reports, mind maps, flashcards and quizzes, with no need to upload them again.
- Data not used for training: The help centre says your data is not used to train Gemini Notebook unless you provide feedback.
- 80+ languages: Google says the product currently supports more than 80 languages.
- Mobile apps: Apps are available for Android, iPhone and iPad alongside the desktop browser version.
Cons
NotebookLM’s main drawbacks are confusing naming since the July 2026 rename, usage quotas that Google does not publish as fixed numbers, and new features such as code execution reaching paid tiers first.
- Confusing naming: Google now calls the product Gemini Notebook, while older guides, directories and search results still say NotebookLM.
- Quotas are not published: The help centre describes paid limits only as multiples, two times standard on AI Plus and four times on AI Pro. Your actual quota appears in the product settings.
- Rolling usage windows: Google says quota refreshes every five hours until you reach a weekly limit, so heavy sessions can pause mid-project.
- Newest features are gated: Code execution reached AI Ultra and eligible Workspace customers first, with Pro on the web to follow. Google gave no date for the free tier.
- No standalone subscription: Higher limits come only with a Google AI Plus, Pro or Ultra plan, so you cannot pay for more notebook capacity alone.
- Depends on your sources: Answers are restricted to what you upload, so thin, outdated or biased inputs produce weak answers.
Who is Using NotebookLM?
- Students: Turn readings into study guides and quizzes.
- Researchers: Question large sets of papers.
- Professionals: Summarise reports, contracts and meeting recordings.
- Content teams: Draft briefings, slides and audio summaries.
Pricing
NotebookLM, now Gemini Notebook, has a free Standard tier. Higher limits come with Google AI Plus, Pro and Ultra subscriptions (official limits, October 2026).
| Plan | Price | What you get |
|---|---|---|
| Standard | $0 | 100 notebooks, 50 sources per notebook |
| Plus | Part of Google AI Plus | 200 notebooks, 100 sources per notebook |
| Pro | Part of Google AI Pro | 500 notebooks, 300 sources per notebook |
| Ultra | Part of Google AI Ultra | 500 notebooks, 500 or 600 sources per notebook |
One review site puts Google AI Pro at about $19.99 a month.
Disclaimer: Pricing can change. Check the official Google website.
What Makes NotebookLM Unique?
NotebookLM stands out because it restricts answers to material you choose, which reduces unsupported claims. It also converts the same sources into audio, video, slides and study aids. Since the rename, Google says notebooks sync with the Gemini app.
Compatibilities and Integrations
- Platforms: Desktop browser, Android, iPhone and iPad.
- Sources: PDFs, websites, YouTube videos, audio files, Google Docs and Google Slides.
- Source size: Up to 500,000 words or 200MB per upload.
- Google: Syncs with the Gemini app.
NotebookLM Tutorials
Learn NotebookLM in a few minutes:
- Open notebook.google and sign in with a Google Account.
- Create a notebook and add your sources.
- Ask a question and click the citations to check the answer.
- Generate an Audio Overview, mind map or quiz from the same sources.
How We Rated It
| Criterion | Score | Why |
|---|---|---|
| Accuracy and Reliability | 4.5/5 | Grounded answers with citations |
| Ease of Use | 4.5/5 | Upload, then ask |
| Functionality and Features | 4.7/5 | Many output formats |
| Performance and Speed | 4.3/5 | Not tested hands-on |
| Customization and Flexibility | 4.2/5 | You choose the sources |
| Data Privacy and Security | 4.2/5 | Google account controls |
| Support and Resources | 4.3/5 | Detailed help centre |
| Cost-Efficiency | 4.5/5 | Capable free tier |
| Integration Capabilities | 4.3/5 | Google Docs, Slides, Gemini |
| Overall Score | 4.4/5 | Average of the nine criteria |
Summary
NotebookLM, under its new Gemini Notebook name, is one of the strongest tools for working with your own documents. The free tier covers most personal study and research. Verify important points against the cited source, and check current limits before paying for a Google AI plan.

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