Build Your First Multi-Agent System with OpenAI Agents SDK — Step-by-Step Python Tutorial (2026)

Build Your First Multi-Agent System with OpenAI Agents SDK — Step-by-Step Python Tutorial (2026) You have heard the buzz around AI agents. You have probably built a single-agent chatbot. But real-world automation needs multiple agents working together — one to research, one to write, one to review and catch mistakes. The OpenAI Agents SDK makes this surprisingly straightforward. In this tutorial, you will build a complete multi-agent content pipeline: a Research Agent gathers information, a Writer Agent drafts content, and a Reviewer Agent validates quality with guardrails. All orchestrated through handoffs, running in under 100 lines of core logic. By the end, you will understand every building block — Agent, Runner, Handoff, and Guardrails — and have a working system you can adapt to your own projects. What you will build: A three-agent content pipeline where agents hand off work to each other automatically. The Research Agent finds information, the Writer Agent creates a draft, and