NotebookLM
Grounded research notebook with audio and video overviews.
Full NotebookLM record →Head to head
NotebookLM vs ChatGPT Deep Research
NotebookLM (Google) and ChatGPT Deep Research (OpenAI) both sit in Search & Research. NotebookLM is the cheaper entry point at Free, Pro via Google AI Plus. ChatGPT Deep Research shipped more tracked changes in the last 30 days (4 vs 0). Every value below comes from the latest crawl of the vendors' own pages.
| Attribute | NotebookLM | ChatGPT Deep Research OpenAI |
|---|---|---|
| Segment | Search & Research | Search & Research |
| Version | 2025 | gpt-6-astra |
| Entry cost | Free, Pro via Google AI Plus | from $20/mo |
| Pricing tiers | — | Free free · Plus $20 · Pro $200 |
| Model stack | Gemini 3 | GPT-5.2 Thinking · gpt-5.6 · gpt-6-astra · o3 (optimized version) · o4-mini (lightweight version) |
| Context window | — | 196K tokens |
| Public API | ||
| Routes models | ||
| Changes / 30d | 0 | 4 |
| Origin | Global | Global |
| Capabilities | Source grounding, Audio overviews, Mind maps | Multi-step browsing, Cited reports, Python analysis, File and image reading, Deep research, Specialized models, Web search, Agents |
ChatGPT Deep Research
An agentic mode that browses for many minutes and returns a cited report.
Full ChatGPT Deep Research record →