Research AIs compared task by taskToday’s edition · 8 November 2026
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Best Research AI / Glossary / Deep research
Glossary

Deep research

Answer in brief

Deep research is a multi-step mode in which an AI plans, searches, reads and writes a long cited report.

What it means

Deep research is a mode in which an AI works through a question in several steps rather than answering in one pass. It typically proposes a plan, runs many searches, reads a large number of pages, and then assembles a structured report. Each step can change what the next step looks for.

The mode trades speed for depth. A deep research run takes longer than a quick search and can use more compute. Check the plan before you start, if the tool lets you. A wrong plan wastes the whole run, so a short review at the start often saves time later. A useful habit is to note which step of the process produced each claim you rely on. Treat it as one input among several, not as proof on its own.

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Cite this entry

Best Research AI. “Deep research.” Hyperresearch reference, reviewed 8 November 2026.
https://bestresearchai.com/glossary/deep-research/