OpenAI Set to Unveil Agent Builder at DevDay 2025
Agent Builder could offer a canvas-like interface, streamlining the process of composing, connecting, and orchestrating AI agents
OpenAI is reportedly preparing to unveil its Agent Builder tool during DevDay 2025 on October 6. The forthcoming feature is expected to enable developers to build agentic workflows, integrate MCP (Model Context Protocol) tools, and add ChatKit widgets and other capabilities.
Agent Builder could offer a canvas-like interface, streamlining the process of composing, connecting, and orchestrating AI agents within the OpenAI ecosystem. That would mark a significant step toward democratising agent design for developers.
the rumor is openai drops “agent builder” tomorrow and wow, if that's true thats a BIG DEAL
— GREG ISENBERG (@gregisenberg) October 5, 2025
for the 12 months, people have been stitching together tools like n8n, zapier, make, vapi, and claude workflows to simulate autonomy.
it worked but it was duct tape.
now IMAGINE that… pic.twitter.com/zzkHkLNMWC
BREAKING 🚨: OpenAI is planning to announce Agent Builder on DevDay. Agent builder will let users build their agentic workflows, connect MCPs, ChatKit widgets and other tools.
— TestingCatalog News 🗞 (@testingcatalog) October 5, 2025
This is one of the smoothest Agent builder canvases I've used so far.
The year of Agents 🤖 pic.twitter.com/BmSALOATGM
DevDay is already shaping up to be a major event. According to OpenAI’s announcement, the conference will host more than 1,500 developers with keynotes, demos, and product reveals.
TechCrunch reports that Altman’s opening keynote is expected to include “announcements, live demos, and a vision of how developers are reshaping the future with AI.”
Damn OpenAI is really going after Zapier and n8n...
— Riley Brown (@rileybrown_ai) October 5, 2025
They're releasing an "Agent Builder" tomorrow (apparently).
And you'll be able to add MCP tools, Guardrails and more.
For the past three years people have been making ChatGPT wrappers.
I think the next wave will be Agent… pic.twitter.com/OKBinJPiGT
While OpenAI has not officially confirmed the Agent Builder, the platform’s potential is drawing early attention. If launched, it could accelerate the creation of custom agents by bridging protocol, tooling, and orchestration in a unified interface—something developers have eagerly awaited.
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