April 17, 2025, OpenAI announced via social media the release of a 34-page "Practical Guide to Building Agents," offering developers comprehensive guidance on building agent applications. This marks another significant advancement in OpenAI's efforts to promote the implementation and standardization of AI technology.

According to the tweet, the guide details how to build agents using OpenAI's Responses API, covering functionalities such as web search, file search, and computer usage. The Responses API is a significant upgrade to the Chat Completions API, incorporating the tool usage capabilities of the Assistants API to simplify the process for developers building complex task agents.

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The guide emphasizes the API's flexibility and ease of use, supporting multiple tool calls to help developers automate task execution, such as code writing and travel booking. Furthermore, OpenAI stated that the Responses API is now freely available to developers, billed at standard rates, and that stored data is not used for model training, ensuring user privacy.

The guide also reveals that OpenAI plans to gradually deprecate the Assistants API by mid-2026, with migration support provided. The release of this guide further solidifies OpenAI's leading position in agent technology, providing developers with practical tools and a clear path to accelerate the adoption of AI applications across various industries.

Developers can access the full guide on the OpenAI website to explore the limitless possibilities of agent development.

Link:https://cdn.openai.com/business-guides-and-resources/a-practical-guide-to-building-agents.pdf