Every Research Agents comparison and buyer's guide for building AI agents — 3 pieces and counting. Each is a head-to-head or a “best X for Y” roundup with a sources-backed verdict.
OpenAI and Google ship deep-research as a closed feature. These seven open repositories let you run the same plan-search-read-synthesize loop on your own models, your own sources, and — if you want — entirely on your own machine.
A deep research agent hands you a long, confident, well-structured report. Grading it means measuring two different things at once — how good it reads, and whether a single sentence is actually supported.
Three open-source answers to Deep Research, and they disagree on one thing — how the research loop is controlled. One project's benchmark proves that choice is the whole game.