GPT Researcher is an open-source deep-research agent that can investigate questions using the web and local information and produce detailed reports with citations. It was built to address common limitations of one-shot LLM research, including shallow source coverage, outdated knowledge, hallucination, bias, and difficulty producing long, well-supported reports.

Its architecture separates planning, information gathering, and publishing. A planner generates research questions, execution agents gather and summarize relevant sources in parallel, and the results are filtered and combined into a final report with source tracking. The project also supports customization for domain-specific research agents and integration into other agent environments.

GPT Researcher is useful for market research, technical investigation, academic-style exploration, competitive analysis, and other tasks where a user needs a synthesized answer backed by multiple sources. It provides a reusable research pipeline rather than simply wrapping a language model with web search.