Which AI model does Gemini Notebook use?
Last verified: October 27, 2026
As of October 2026, Gemini Notebook runs on Google's Gemini 3.5 family. Reports say the upgrade began rolling out in June 2026, first to Google AI Ultra and then to Google AI Pro on the web, replacing Gemini 3. Google does not let you pick the model, and it can differ by plan and feature.
In more detail
NotebookLM moved from Gemini 2.5 Flash to Gemini 3 in late 2025, and coverage from June 2026 describes the Gemini 3.5 upgrade reaching Ultra subscribers first and then Pro on the web. Google does not expose a model picker in Gemini Notebook, and Audio and Video Overviews use their own generation pipelines, so treat the chat model as a moving target and check Google's release notes. Whatever the model, answers stay grounded in your sources, so the quality of your source set matters most. Notebook Toolkit helps curate that source set from AI chats and the web.
| Period | Model |
|---|---|
| Until late 2025 | Gemini 2.5 Flash |
| Late 2025 | Gemini 3 |
| From June 2026 | Gemini 3.5 (Ultra first, then Pro on web) |
Sources
Get one-click capture for NotebookLM
Gemini Notebook Toolkit saves ChatGPT, Claude, YouTube, Reddit, and any web page to NotebookLM in one click. Free to install.
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