Gemini 3.5 and Antigravity come to Google NotebookLM
Summary
Google's NotebookLM gets a major update with the Gemini 3.5 model, expanded file support, and a new Antigravity feature for code execution and workflow automation.
<p>Google's NotebookLM was one of the company's first forays into generative AI technology, and in un-Googley fashion, it hasn't been shut down yet. In fact, NotebookLM is getting one of its biggest updates, ever, today, moving to the latest Gemini 3.5 model, support for more file types, and streamlined web source integration. Google also says NotebookLM will be able to do more with all those queries thanks to embedded support for Antigravity.</p>
<p>Gemini 3.5 Flash <a href="https://arstechnica.com/google/2026/05/google-announces-agent-optimized-gemini-3-5-flash-and-a-do-anything-model-called-omni/">debuted at Google I/O this year</a>, promising much faster and more efficient processing. Google has claimed that companies worried about token costs can save big by moving their projects to the new Flash model while also getting outputs that are of similar or better quality. Those improvements are now filtering down to other Google products. NotebookLM, which launched in 2023 at the very beginning of the AI boom, lets you analyze specific sources like documents and webpages with Google's latest AI models.</p>
<img width="1000" height="562" src="https://cdn.arstechnica.net/wp-content/uploads/2026/06/IMG_NewGraph_2x.width-1000.format-webp.png" class="fullwidth full" alt="NotebookLM evaluation graph" decoding="async" loading="lazy" srcset="https://cdn.arstechnica.net/wp-content/uploads/2026/06/IMG_NewGraph_2x.width-1000.format-webp.png 1000w, https://cdn.arstechnica.net/wp-content/uploads/2026/06/IMG_NewGraph_2x.width-1000.format-webp-640x360.png 640w, https://cdn.arstechnica.net/wp-content/uploads/2026/06/IMG_NewGraph_2x.width-1000.format-webp-768x432.png 768w, https://cdn.arstechnica.net/wp-content/uploads/2026/06/IMG_NewGraph_2x.width-1000.format-webp-384x216.png 384w, https://cdn.arstechnica.net/wp-content/uploads/2026/06/IMG_NewGraph_2x.width-1000.format-webp-980x551.png 980w" sizes="auto, (max-width: 1000px) 100vw, 1000px">
The upgraded NotebookLM beats the old version in all of Google's "core evaluation dimensions."
Credit:
Google
<p>Google conducted side-by-side evaluations of NotebookLM on the old Gemini 3.1 branch and with the updated 3.5. The company is being somewhat vague about the nature of the tests, breaking things up into "top five core evaluation dimensions," which are Accuracy and Quality, Multilingual Support, Large Document Analysis, Document Creation, and Advanced Research. In these tests, <a href="https://blog.google/innovation-and-ai/products/notebooklm/better-research-notebooklm/">Google says</a> NotebookLM averaged a 65 percent win rate versus the older model.</p><p><a href="https://arstechnica.com/ai/2026/06/gemini-3-5-and-antigravity-come-to-google-notebooklm/">Read full article</a></p>
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# Gemini 3.5 and Antigravity come to Google NotebookLM
Source: [https://arstechnica.com/ai/2026/06/gemini-3-5-and-antigravity-come-to-google-notebooklm/](https://arstechnica.com/ai/2026/06/gemini-3-5-and-antigravity-come-to-google-notebooklm/)
Google’s NotebookLM was one of the company’s first forays into generative AI technology, and in un\-Googley fashion, it hasn’t been shut down yet\. In fact, NotebookLM is getting one of its biggest updates, ever, today, moving to the latest Gemini 3\.5 model, support for more file types, and streamlined web source integration\. Google also says NotebookLM will be able to do more with all those queries thanks to embedded support for Antigravity\.
Gemini 3\.5 Flash[debuted at Google I/O this year](https://arstechnica.com/google/2026/05/google-announces-agent-optimized-gemini-3-5-flash-and-a-do-anything-model-called-omni/), promising much faster and more efficient processing\. Google has claimed that companies worried about token costs can save big by moving their projects to the new Flash model while also getting outputs that are of similar or better quality\. Those improvements are now filtering down to other Google products\. NotebookLM, which launched in 2023 at the very beginning of the AI boom, lets you analyze specific sources like documents and webpages with Google’s latest AI models\.
[](https://cdn.arstechnica.net/wp-content/uploads/2026/06/IMG_NewGraph_2x.width-1000.format-webp.png)
The upgraded NotebookLM beats the old version in all of Google’s “core evaluation dimensions\.”
Credit: Google
The upgraded NotebookLM beats the old version in all of Google’s “core evaluation dimensions\.”Credit: Google
Google conducted side\-by\-side evaluations of NotebookLM on the old Gemini 3\.1 branch and with the updated 3\.5\. The company is being somewhat vague about the nature of the tests, breaking things up into “top five core evaluation dimensions,” which are Accuracy and Quality, Multilingual Support, Large Document Analysis, Document Creation, and Advanced Research\. In these tests,[Google says](https://blog.google/innovation-and-ai/products/notebooklm/better-research-notebooklm/)NotebookLM averaged a 65 percent win rate versus the older model\.
NotebookLM also now has its own “cloud computer,” which allows NotebookLM to use Antigravity to write and run code in service of your research goals\. Google says NotebookLM will come with a set of more than 100 software skills that can help you build workflows with your notebooks that previously would have required you to jump between apps\.
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