OpenAI engineers say the new tools will help enterprises more easily build agents with advanced reasoning and multimodal capabilities.

OpenAI is working to make that promise happen. On Tuesday, OpenAI unveiled a new " Responses API " designed to help software developers create AI agents that can perform tasks independently using the company's AI models. The Responses API will eventually replace the current Assistants API, which OpenAI plans to retire in the first half of 2026.

OpenAI is changing how AI agents work with its new Agents SDK and Responses API. Here's how these tools improve automation, multi-agent collaboration, and workflow orchestration for developers.