What are NotebookLM's limits?
Free tier: 100 notebooks, 300 sources per notebook, 50 daily chat queries, 3 Audio Overviews per day. Per-source: up to 500K words / 200 MB. Plus tier: 5x higher across the board (500 notebooks, 1,500 sources, 250 queries, 15 Audio Overviews).
In more detail
NotebookLM Free in 2026: 100 total notebooks, 300 sources per notebook, 50 daily chat queries across all notebooks (resets at midnight Pacific Time), 3 Audio Overviews per day, per-source max 500,000 words or 200 MB. NotebookLM Plus (via Google One AI Premium, $19.99/month): 500 notebooks, 1,500 sources per notebook, 250 daily queries, 15 Audio Overviews per day, plus Audio Overview customization, premium Gemini models, and shared/team notebooks. Common workarounds: curate sources tightly (30 great > 300 mediocre), batch queries in focused sessions, split very long PDFs into chapters.
Get one-click capture for NotebookLM
Notebook Toolkit saves ChatGPT, Claude, YouTube, Reddit, and any web page to NotebookLM in one click. Free to install.
Install Notebook Toolkit