Gemini Notebook is the new name for NotebookLM, Google's research assistant that answers only from the documents you give it and shows you exactly where each answer came from. The rebrand came with a real upgrade: every notebook now has a secure cloud computer that can run code on your data, so it can calculate instead of guess.
Renamed from NotebookLM on July 16, 2026 — same product, same notebooks, nothing to migrate. Every notebook gets a secure cloud computer that runs code against your sources, so calculations and charts are computed rather than estimated. Keeps the features that made NotebookLM popular: clickable citations, two-host Audio Overviews, and short video summaries. Free to start.
It only knows what you upload, so it is not a web search tool. Google changed usage limits from September 2, 2026, so heavy users may need a paid plan. Grounding in your sources reduces invented answers but doesn't eliminate misreadings — the citations are there so you can check.