DEEP RESEARCH

Deep research agents need constraint ledgers: a persistent record of constraints, evidence obligations, failed paths and open questions, drawn from AREX.

SearchOS turns web research from a growing chat transcript into shared state: frontier tasks, evidence graphs, coverage maps, and failure memory. That is the pattern serious deep-research agents need.

ChatGPT Agent combines Operator-style actions with deep research in one agent. What it can produce, how it works, its pricing and limits for developers.

OpenAI Deep Research is a ChatGPT agent that turns a research question into a cited report in minutes. How it works, the model behind it, and its limits.

Gemini Deep Research plans a multi-step research strategy, verifies sources and writes cited reports. See how it works, Docs and Sheets export, and its limits.