Imagine uploading twenty documents: reports, articles, lecture notes, then asking a tool a specific question, and getting an accurate answer based only on those documents, with every sentence pointing to exactly which source it came from.

That is exactly what Gemini Notebook, formerly known as NotebookLM, was built to do.

What is Gemini Notebook?

Gemini Notebook is a tool from Google built on the Gemini model, but fundamentally different from an ordinary chat tool: instead of answering from its general knowledge, it answers exclusively from the documents you upload.

Google renamed it from NotebookLM to Gemini Notebook in July 2026, as part of a broader push to unify its product names under the Gemini brand. Same product, same features, only the name and the URL changed.

How is it different from ChatGPT, Claude, or regular Gemini?

Ordinary chat tools rely mainly on what they learned during training, and may invent an answer when they do not know it. See the hallucination entry to understand why this happens.

Gemini Notebook is built on a different principle: it only answers based on the sources you gave it. If the information is not in your documents, it will tell you instead of inventing an answer. And every sentence in its answer comes with a citation showing exactly which source it drew from.

This difference makes it a trustworthy research tool, not a general chat tool.

What is it good at?

Summarising large documents. Upload a hundred-page report and ask for a summary, or ask precise questions about a specific chapter.

Connecting multiple sources. It can compare dozens of documents and spot contradictions or shared patterns an ordinary reader would not easily notice.

Audio summaries. The feature that turns your documents into a podcast-style conversation between two virtual hosts, the feature that made it famous when it first launched.

Academic and professional research. Very well suited to reviewing research literature, analysing case files, or studying multiple financial reports.

Where does it fall short?

Limited by what you upload. If your sources are incomplete or biased, its answers will be too. It is a mirror of your documents, not an independent source of knowledge.

Upload limits. The number of sources and words per notebook is capped, with higher caps on paid plans.

Moroccan Darija. If your documents are in Darija, comprehension accuracy drops compared to Standard Arabic or English.

Plans and pricing

A free plan with reasonable limits on notebooks, sources, and daily questions, plus paid plans tied to Google AI subscriptions that raise these limits and add extra features.

Since these limits and prices changed more than once during 2026, the only reliable source is Google’s official announcement and the current pricing page.

In short

Gemini Notebook is not a competitor to ChatGPT or Claude. It serves a completely different purpose: built to read what you give it, not to answer from general knowledge that might be wrong.

When you need a reliable answer from documents you already own, this specific tool is the better fit, more than any general chat tool.