Agent that browses the web, analyzes information, and creates reports. Grok calls it DeepSearch. Similar to gemini/openai deep research.

https://x.ai/news/grok-3#grok-agents-combining-reasoning-and...

It's an agentic research mode, grounded with links from the web that reduce or eliminate hallucinations. The results is a very detailed, sometimes 50 page output. Very useful if you're trying to understand a new industry, state-of-the-art on a tech etc.