OpenAI: Build Hour: Agentic Tool Calling

Author: OpenAI - Bewertung: 265x - Views:8386

In 2025, agents don’t just think — they run code, call tools, and complete tasks.



This Build Hour is a hands-on walkthrough of how to design agentic systems that reason and act using OpenAI’s latest APIs and SDKs.



Ilan Bigio (Developer Experience) covers:

- What’s new in 2025: Responses API, Agents SDK, Hosted Tools, Codex, and more

- Chain of thought concepts: reasoning, tool calling, and long-horizon tasks

- Live demo: building an agentic task system to process a backlog of tickets

- Delegation: directional guidance for evals

- Live Q&A



👉 Follow along with the code repo: https://github.com/openai/build-hours

👉 Check out additional resources: https://developers.openai.com/

👉 Sign up for upcoming live Build Hours: https://webinar.openai.com/buildhours