Gemini Notebook (formerly NotebookLM)

Google's AI research assistant that turns your own documents into an interactive, conversational knowledge base, including surprisingly good AI podcast summaries.

Free Standard plan / Plus, Pro and Ultra come with Google AI plans

My take

The Audio Overview feature genuinely surprised me. Upload your research and it generates a natural-sounding podcast between two hosts talking through your content. I keep coming back to it when I need to actually absorb something dense rather than just skim it.

Visit Gemini Notebook (formerly NotebookLM) Back to tools

At a Glance

Pros

+ 'Audio Overview' generates genuinely listenable podcast-style summaries
+ Grounded in your own sources, which cuts down on hallucination
+ Handles multiple document types (PDFs, web pages, YouTube, etc.)
+ Free tier is very generous
+ Well suited to learning and research workflows

Cons

− Answers only from the sources in the notebook; web results have to be added as sources first
− Audio Overview voices sound good but can be repetitive in format
− Google account required

Best for: Turning documents, articles, and research into conversational, interactive summaries

Full Review

Gemini Notebook, which Google renamed from NotebookLM on 16 July 2026 (old links redirect, and it is still a standalone product), is one of Google’s best AI products, and it’s largely free. The concept is simple: upload your sources, and Gemini Notebook becomes an AI assistant that’s grounded specifically in those sources — not the general internet.

Audio overview

The feature that put it on the map is Audio Overview. Upload a research paper, a business report, or even a book chapter, and it generates a podcast-style discussion between two AI hosts. They explain concepts, debate implications, and make the content genuinely engaging. Audio Overviews now come in Deep Dive, Brief, Critique and Debate formats, with a length setting. Gemini Notebook also makes slide decks, mind maps and video overviews.

I expected a gimmick and it isn’t one. I use it regularly to:

Process long research papers during my commute
Create audio summaries of meeting notes for my team
Turn complex documentation into accessible overviews

Grounded in your sources

Unlike ChatGPT or Claude, Gemini Notebook only answers based on the sources in the notebook. That means:

Much lower hallucination risk
Answers are always traceable to specific passages
You control exactly what knowledge the AI has

You can add web sources with Fast Research and Deep Research, but they become sources in the notebook first.

Who should use Gemini Notebook

Researchers, students, knowledge workers, anyone who processes large amounts of text and wants to interact with it more efficiently. The Standard plan is free (100 notebooks, 50 sources each), which makes it an easy recommendation. Plus, Pro and Ultra come with the Google AI plans and add more notebooks, sources and usage. Start with Audio Overview; it’ll sell you on the rest.