NotebookLM upgrades to Gemini 3.5, adds source building

Google has significantly updated its NotebookLM research tool, now defaulting to the advanced Gemini 3.5 model. This upgrade enhances the tool's ability to assist users with research and generate various outputs, including code generation capabilities. Users can now initiate projects by simply asking questions, and NotebookLM will leverage Google Search to help build a knowledge base by suggesting relevant sources. The tool also supports exporting outputs in numerous formats, such as charts, documents, and spreadsheets, making research and analysis more efficient.