> ## Documentation Index > Fetch the complete documentation index at: https://docs.cassidyai.com/llms.txt > Use this file to discover all available pages before exploring further. # Deep research > Enable and use deep research to let Agents perform thorough, multi-step research tasks. Deep Research lets your [Agent](/agents/overview) perform thorough, multi-step research combining web search and your [Knowledge Base](/knowledge-base/overview). Instead of a single search, the Agent plans a research strategy, runs multiple searches, synthesizes findings, and delivers a comprehensive analysis with citations. ## Enable Deep Research Deep Research is enabled per chat session, not per Agent. Start a new chat or open an existing one. Click **Tools** at the bottom of the chat input. Enable the **Deep Research** toggle. Tools picker in Chat showing the Deep Research toggle ## How to use it Type your research question. Deep Research works best with open-ended, complex questions that benefit from multiple angles — competitive analysis, market research, technical comparisons, or policy reviews. The Agent may ask follow-up questions to refine the scope and direction of the research. Answer these to help it focus on what matters most. Deep Research asking clarifying questions before beginning research The Agent delivers a comprehensive report with its findings, analysis steps, and citations to the sources it used — both web results and Knowledge Base documents. Deep Research results with numbered source links at the bottom Deep Research analysis showing the step-by-step research process Deep Research source citations showing web pages and Knowledge Base documents used ## Cost Deep Research uses approximately **500–1,300 credits** per run, depending on the complexity of the question and how many searches are needed. This is significantly more than a standard chat message because the Agent performs multiple searches and analysis steps. Monitor your credit usage in [Settings](/settings/manage-credits). Consider using Deep Research for high-value research tasks where thoroughness matters more than speed. ## Next steps For quick, single-search lookups instead of multi-step research. Monitor and manage your organization's credit usage.