11:00 AM PDT · October 6, 2025
OpenAI CEO Sam Altman on Monday announced the launch ofAgentKit, a toolkit for building and deployingAI agents,at the firm’s Dev Day event.
“AgentKitis a complete set of building blocks available in the open AI platform designed to help you take agents from prototype to production. It is everything you need to build, deploy, and optimize agent workflows with way less friction,” Altman said.
The launch highlights OpenAI’s push to increase developer adoption by making agent building faster and easier. It also signals a competitive move against other AI platforms racing to offer integrated tools for building autonomous agents for enterprises that can perform complex tasks, not just respond to prompts.
AgentKitwas one of several announcements at OpenAI’s Dev Day,including the launch of the ability to build apps directly inside ChatGPT, which has hit 800 million weekly active users.
AgentKitincludes a few core capabilities. The first is Agent Builder, which Altmandescribedas like Canva for building agents.
“It’s a fast, visual way to design the logic, steps, ideas,” Altman said. “It’sbuilt on top of the responses API that hundreds of thousands of developers already use.”
The second capability ofAgentKitisChatKit, which provides a simple embeddable chat interface that developers can use to bring chat experiences into their own apps.
“You can bring your own brand, your own workflows, whatever makes your own product unique,” Altman said.
Evals for Agentsintroduces tools to measure AI agent performance, including step-by-step trace grading, datasets for assessing individual agent components, automated prompt optimization, and the ability to run evaluations on external models directly from the OpenAI platform.
Finally,AgentKitincludes access to OpenAI’s connector registry, so developers can securely connect agents to internal tools and third-party systems through an “admin control panel” whilemaintainingsecurity and control.
To prove how easy it is to useAgentKit, Christina Huang, an OpenAI engineer, built an entire AI workflow and two AI agents live onstage in under eight minutes.
“This is all the stuff that we wished we had when we were trying to build our first agents,” Altman said, noting that OpenAI has already signed on several launch partners that have already scaled agents usingAgentKit.
Rebecca Bellan is a senior reporter at TechCrunch where she covers the business, policy, and emerging trends shaping artificial intelligence. Her work has also appeared in Forbes, Bloomberg, The Atlantic, The Daily Beast, and other publications.
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