NotebookLM adds Data Tables and chat history as Google expands AI Ultra tier capabilities

NotebookLM Chat History Feature Rolls Out to All Users

Google has completed the rollout of chat history functionality for NotebookLM, making it available to all users across mobile and web platforms after initially announcing the feature in October 3

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. The chat history feature enables persistent conversations across devices, allowing users to start a session on mobile and continue seamlessly on the web, or vice versa 5

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. Each response is timestamped with the day and date, and users maintain full control over their data with the ability to delete chat history at any time through the three-dot overflow menu 3

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. For user privacy considerations, chats in shared notebooks remain visible only to the individual user who created them 5

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NotebookLM AI Ultra Tier Gains Expanded Usage Limits

Google officially integrated NotebookLM into its AI Ultra subscription plan, which costs $249.99 per month and promises the highest level of access to Google AI capabilities 1

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. The NotebookLM AI Ultra tier delivers dramatically expanded usage limits compared to the AI Pro tier, representing roughly a 10x increase across most features 5

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. Ultra subscribers can send up to 5,000 chats per day compared to just 50 for free users, generate 200 Audio Overviews, 200 Video Overviews, and conduct 200 Deep Research sessions daily 1

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. The subscription plan also allows users to create 1,000 Reports, 1,000 Flashcards, and 1,000 Quizzes per day, a significant jump from the 10 per day limit for free-tier users 1

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Ultra users can add up to 600 sources per notebook, double the 300 sources available to AI Pro tier subscribers, and notebooks can accommodate 1,000 users compared to 500 with AI Pro 5

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. Both Pro and Ultra users can create up to 500 notebooks per user, compared to 100 for free users and 200 for Plus users 1

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. The tier provides priority access to key AI features and the highest access to Gemini models, positioning it as a solution for high-volume professional users 1

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Watermark Removal and Professional Output Capabilities

One of the most significant differentiators for the Ultra tier is watermark removal for Slide Decks and Infographics, making NotebookLM a more viable tool for professional presentations and client-facing materials 5

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. Slide Decks generate full-fledged presentations complete with layouts, visuals, and text, while Infographics provide visually focused summaries of sources uploaded to notebooks 1

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. By default, both features include NotebookLM's logo at the bottom, but Ultra subscribers can produce completely clean, professional-looking outputs without any branding 1

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. This capability addresses a critical need for businesses and professionals who require polished, brand-consistent materials for external use.

Data Tables Feature Transforms Unstructured Information

Google introduced a Data Tables feature to its AI research platform, enabling users to collect and synthesize information across multiple sources into structured charts that can be exported to Google Sheets 2

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. The tool accepts requests in natural language statements, making it accessible to users without technical expertise 2

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. Google suggests Data Tables can organize scattered notes, create price comparison charts, or aggregate results from multiple research projects 2

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. The feature takes messy, unstructured information from notebooks and organizes it into clean, structured tables with clear fields and relevant facts 4

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Currently, Data Tables is available to all users on Google's AI Pro and Ultra tiers, with a rollout to free NotebookLM users planned for the coming weeks 4

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. This phased approach suggests Google is testing the feature with paying subscribers before broader distribution.

Enhanced Export Capabilities and Collaboration Tools

NotebookLM now allows users to export notes and reports through the three-dot menu overflow button in Content Studio, enabling editing outside the app 4

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. Depending on the content type, users can export to Google Docs or Google Sheets 4

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. However, there's currently no option to export Slide Decks to Google Slides or download them as PowerPoint files, despite NotebookLM's ability to generate full presentations 4

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. The export functionality makes collaboration easier by allowing users to share NotebookLM-generated content with others without requiring them to use the platform directly 4

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Gemini Integration and Future Development Path

Google began integrating NotebookLM with Gemini earlier this month, allowing users to attach notebooks to Gemini chats 3

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. The platform also expanded custom chat prompts from 500 to 10,000 characters, significantly increasing the complexity of queries users can submit 3

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. Despite Google rolling out Gemini 3 in mid-November and making it available across AI Mode and Search, NotebookLM continues to run on Gemini 2.5 4

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. However, an upgrade to Gemini 3 appears likely for 2026, which could bring enhanced reasoning capabilities and improved output quality 4

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. The rapid pace of feature additions suggests Google views NotebookLM as a strategic priority within its AI portfolio, particularly as competition intensifies in the AI research tools market.