Most Teachers Do Not Have NotebookLM Gemini 3.5

The NotebookLM Gemini 3.5 update, announced June 8, 2026, is not available on the standard free tier or on standard Google Workspace for Education accounts. It is currently limited to Google AI Ultra subscribers and Workspace business customers with AI Ultra Access or AI Expanded Access. If you are a teacher using NotebookLM through a free personal account or a school issued Workspace for Education account, you are almost certainly still running on Gemini 2.5 Pro, which is the model actually built for education use and the one your notebooks are using today.

That distinction matters because most coverage of this update talks about it as if it reached everyone, and it did not. Here is the full picture, based on Google's own published editions comparison and its education specific documentation, not just the initial announcement coverage.

What NotebookLM Gemini 3.5 Actually Includes

The June 8 update moved NotebookLM onto Gemini 3.5 as the default model for eligible accounts, alongside three new capabilities. A guided source discovery feature lets you describe a research topic in chat and have NotebookLM search the web and suggest sources to add, rather than requiring you to gather every source yourself before starting. Each notebook gained what Google calls a secure cloud computer, letting NotebookLM write and run code for deeper data analysis within a notebook. Output formats expanded to include charts, structured data tables, and files in PowerPoint and PDF formats generated directly from your sources.

These are genuinely significant capabilities. They are also, as of this writing, not available to the account type most classroom teachers actually use.

Why Standard NotebookLM Accounts Are Not on Gemini 3.5

Google's own education documentation is specific about this. NotebookLM, now being rebranded as Gemini Notebook, is included free of charge in every Google Workspace for Education edition, and it runs on Gemini 2.5 Pro, which incorporates LearnLM, a family of models Google fine-tuned specifically for learning contexts with education experts. This is described as the model powering the education product, not Gemini 3.5.

Separately, Google's free consumer tier for any personal Google account gives access to NotebookLM with published limits of up to 100 notebooks, 50 sources per notebook, a 500,000 word limit per source, 50 daily chat queries, and three audio overviews per day. Nothing in that free tier description includes Gemini 3.5, the secure cloud computer, or the source discovery feature.

The Gemini 3.5 update specifically requires a Google AI Ultra subscription, which is a personal paid tier well above the standard AI Pro or AI Plus consumer subscriptions, or a Workspace business account with AI Ultra Access or AI Expanded Access add ons. Workspace for Education accounts are a distinct product line from Workspace business accounts, and the reporting on this update names business customers specifically, not education customers.

What Is the Difference Between Gemini 2.5 Pro and Gemini 3.5 in NotebookLM?

Gemini 2.5 Pro, the model powering standard and education NotebookLM accounts, includes LearnLM tuning specifically designed for learning and teaching contexts, along with stricter content policies for users under 18 built into the education product. Gemini 3.5, available only to AI Ultra and Workspace business AI Expanded Access customers, adds the source discovery, secure cloud computer, and expanded export capabilities described above, along with what Google describes as improved reasoning accuracy and clearer visibility into how the model reaches its answers.

For a teacher's actual daily use, meaning building a unit notebook and querying it with students, the education specific tuning in Gemini 2.5 Pro is arguably more relevant than the newer model's added capabilities, most of which are aimed at more advanced, code driven research and analysis workflows rather than classroom instruction.

Should Teachers Try to Get Access to Gemini 3.5 in NotebookLM?

For most classroom use, no, and not because the newer model is not good. It is because the specific new capabilities, source discovery through open web search and code execution for data analysis, are not the features that matter most for the unit notebook workflow most teachers actually use NotebookLM for. The value of a teacher built unit notebook comes from curating a specific, bounded set of sources for students to work within. A feature that lets the AI find its own sources through open search works against that specific design principle for student facing use, even though it could genuinely help a teacher's own unit preparation research.

If your school already has a Workspace for Education AI Pro upgrade or a paid personal AI subscription for other reasons, the model upgrade is a reasonable bonus rather than something worth purchasing specifically for this purpose. If you do not already have one of those, the standard Gemini 2.5 Pro powered version most teachers already have access to remains the right tool for building and using a classroom unit notebook.

Quick Answers

Is NotebookLM Gemini 3.5 free for teachers? No. The Gemini 3.5 update is limited to Google AI Ultra subscribers and Workspace business customers with AI Ultra Access or AI Expanded Access. Standard free accounts and standard Google Workspace for Education accounts remain on Gemini 2.5 Pro.

What model does NotebookLM use for Google Workspace for Education accounts? Gemini 2.5 Pro, which incorporates LearnLM, a model family Google built specifically for learning and teaching contexts, along with additional content protections for users under 18.

Is NotebookLM being renamed? Yes. Google announced in mid July 2026 that NotebookLM is being renamed Gemini Notebook, tying the product more directly to the main Gemini brand, though the underlying functionality for most users has not changed as part of that rename.

What is the free tier limit for NotebookLM? Up to 100 notebooks per user, 50 sources per notebook, a 500,000 word limit per source, 50 daily chat queries, and three audio overviews per day, based on Google's published consumer tier limits.

Does the Gemini 3.5 update change anything for teachers who do not have access to it? Not directly. Standard accounts continue running on Gemini 2.5 Pro exactly as before. The update only affects accounts specifically on AI Ultra or Workspace business AI Expanded Access tiers.