Build Time: Responses API
Build Time: Responses API


Author: OpenAI – Duration: 00:51:16
The Responses API is our flagship API for creative agents. This build hour shows how the Responses API unlocks persistent reasoning, hosted tooling, and multi-modal workflows for GPT-5. Steve Coffey (API Engineering) explains: • How to use built-in tools, call multiple tools in a single API request, and persist reasoning tokens across rounds • How API Responses is faster and more cost-effective • Live Demo: Create a simulator to bring a day in the life of an OpenAI engineer to life • Live Q&A 👉 Follow the code repository: https://github.com/openai/build-hours
👉 Answers API docs: https://platform.openai.com/docs/api-reference/responses
👉 Responses API migration guide: https://platform.openai.com/docs/guides/migrate-to-responses
👉 Sign up for upcoming live build times: https://webinar.openai.com/buildhours/






