To address these challenges, we’re launching a new set of APIs and tools specifically designed to simplify the development of agentic applications:

These new tools streamline core agent logic, orchestration, and interactions, making it significantly easier for developers to get started with building agents. Over the coming weeks and months, we plan to release additional tools and capabilities to further simplify and accelerate building agentic applications on our platform.

The Responses API is our new API primitive for leveraging OpenAI’s built-in tools to build agents. It combines the simplicity of Chat Completions with the tool-use capabilities of the Assistants API. As model capabilities continue to evolve, we believe the Responses API will provide a more flexible foundation for developers building agentic applications. With a single Responses API call, developers will be able to solve increasingly complex tasks using multiple tools and model turns.

To start, the Responses API will support new built-in tools like web search, file search, and computer use. These tools are designed to work together to connect models to the real world, making them more useful in completing tasks. It also brings with it several usability improvements including a unified item-based design, simpler polymorphism, intuitive streaming events, and SDK helpers like response.output_text to easily access the model’s text output.

The Responses API is designed for developers who want to easily combine OpenAI models and built-in tools into their apps, without the complexity of integrating multiple APIs or external vendors. The API also makes it easier to store data on OpenAI so developers can evaluate agent performance using features such as tracing and evaluations. As a reminder, we do not train our models on business data by default, even when the data is stored on OpenAI. The API is available to all developers starting today and is not charged separately—tokens and tools are billed at standard rates specified on our pricing page⁠(opens in a new window). Check out the Responses API quickstart guide⁠(opens in a new window) to learn more.