ChatGPT Deep Research is listed under Deep Research & Documents, in the Research & Learning category on Flocci AI Tools. Runs up to ~30 min for exhaustive reports. It is freemium — a usable free tier with paid plans above it, and it lives at chatgpt.com.
ChatGPT Deep Research is freemium: there is a free tier you can work in and paid plans above it. It is one of 391 freemium tools in the catalog, all labelled the same way so you are never surprised by a paywall.
ChatGPT Deep Research does 4 things the catalog singles out: Runs up to ~30 min for exhaustive reports; browses hundreds of sources; structured, cited long-form output; limited runs on lower tiers.
STORM (Stanford) is the closest free alternative: it sits in the same Deep Research & Documents sub-category and is free. ChatPDF, Gemini Deep Research and NotebookLM also start free. The full list is on the alternatives page.
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