Google Integrates Gemini 3.5 and Antigravity into NotebookLM

Google has announced a significant upgrade to NotebookLM, integrating the Gemini 3.5 model and the "Antigravity" framework to enhance its research and note-taking capabilities, currently limited to AI Ultra and enterprise users.

Enhanced Intelligence with Gemini 3.5

Google is upgrading the underlying architecture of NotebookLM by implementing Gemini 3.5. This integration is expected to provide the platform with improved reasoning capabilities and more precise context handling, allowing users to synthesize complex information from their uploaded sources with greater accuracy.

Introduction of Antigravity

Alongside the model update, Google is introducing "Antigravity" to the NotebookLM ecosystem. While specific technical specifications of the Antigravity framework were not detailed in the initial announcement, its implementation marks a strategic shift in how the tool manages information retrieval and synthesis within the notebook environment.

Availability and Access Constraints

These new features are not being rolled out to the general public immediately. Access to Gemini 3.5 and Antigravity within NotebookLM is currently restricted to subscribers of AI Ultra and enterprise-tier accounts, highlighting a tiered deployment strategy for these high-compute capabilities.

Note: Due to the brevity of the source material, specific technical benchmarks for Gemini 3.5 and the functional architecture of the Antigravity framework were not provided.