What is deep research in ChatGPT?
Published . Updated .
Deep research: A ChatGPT mode that runs many web searches and page reads over several minutes and writes a report with citations, rather than a quick answer.
OpenAI announced deep research on 2 February 2025 and said a run takes from about 5 to 30 minutes. Where ChatGPT search answers in seconds from a handful of queries, deep research plans its own steps and reads far more pages.
The same idea, many searches behind one request, is query fan-out taken further. Only Fan Out reads the searches in ordinary ChatGPT, Claude and Grok answers.
Read next
Sources
See the fan-out for your own prompts
Only Fan Out is a free Chrome side panel that lists the queries, fetched pages and cited pages behind each ChatGPT, Claude or Grok answer. Nothing leaves your browser.
Add to Chrome, it's free