A must-read for agent developers: OpenAI releases AI agent building kit

Written by

Iris Vance

Updated on:July-12th-2025

OpenAI has released the AI agent building kit, which provides developers with a one-stop development tool and helps open a new chapter in intelligent agent development.

Core Tools

1. Web Search Tool: Give AI agents real-time web search capabilities, accurately capture the latest information, and ensure that answers are accurate.

2. File Search Tool: After the upgrade, it supports metadata screening, can directly connect to the vector database, and efficiently implement knowledge retrieval (RAG), fully tapping the value of corporate or personal private data.

3. Computer Use Tool: It can control the computer to automatically perform tasks. It can easily handle old software without API and automate complex tasks with one click.

Responses API

The new Responses API is now available, which supports multiple rounds of conversations and can call multiple tools at the same time, simplifying complex processes and greatly improving efficiency. In the future, it will gradually replace the Assistant API (service will be discontinued in 2026).

Agents SDK

The open source agent orchestration framework Swarm has been upgraded to Agents SDK, which is more suitable for production environments. It supports collaboration between agents, task handover, process monitoring and tracking, and a powerful multi-agent system can be built with just a few lines of code.

Pricing Overview

Responses API: Billed based on input and output tokens of the selected language model.

Code Interpreter: $0.03 per session.

· File Search Storage: $0.10 per GB-day of storage (1GB-day is free).

· File Search Tool Call : $2.50 per 1,000 calls, only available for Responses API.

Web Search Tool Call: Varies depending on the model and search context size.