In the OpenAI ecosystem, developers can interact with models through two main APIs: the Responses API and the Chat Completions API. This tutorial will delve into the differences between these two, their applicable scenarios, and how to choose the API that best suits your project needs.
The Responses API is our latest core API and an agentic API primitive that combines the simplicity of chat completions with the ability to perform more agentic tasks. As model capabilities continue to evolve, the Responses API will serve as a flexible foundation for building action-oriented applications, with the following built-in tools:
