Google NotebookLM expands context to 1M tokens and saves chats

Google announced a major update to NotebookLM, its AI-powered notetaking and research assistant, rolling out starting today that expands the app's contextual processing, conversation memory and customization options. The company said the chat feature is now powered by its latest Gemini models and supports a full 1 million token context window across all plans, increases multiturn conversation memory by more than sixfold, and will begin automatically saving conversation history in the coming week.

Google described the context window expansion as roughly an eightfold increase over the previous limit, enabling NotebookLM to analyze much larger document collections without losing thread or context. The company said the larger context and memory capacities make it possible to sustain far longer research sessions and keep the model from dropping earlier parts of a conversation. Google also reported a roughly 50 percent improvement in user satisfaction for responses that draw from a larger number of sources since testing the changes.

The update includes changes to how the system uses uploaded materials. NotebookLM will now examine source documents from multiple angles before...