Editorial illustration for OpenAI Unveils AgentKit and Apps SDK, Expands Developer Tools at DevDay
OpenAI AgentKit Launches Revolutionary Developer Platform
OpenAI unveils AgentKit, Apps SDK, and new ChatGPT at DevDay 2025
OpenAI's big developer conference was a blunt admission. ChatGPT, the chatbot, isn't enough. They now want to be your AI operating system.
The company's DevDay 2025 announcements were a coordinated push to make that happen. They introduced AgentKit and an Apps SDK, two toolkits meant to lock developers into building on ChatGPT's foundation. The goal is to turn the chat window from a place for conversation into a place for apps.
This is a clear, expensive pivot. The conversational interface is becoming a container, a platform for other companies' software to run inside. OpenAI provides the plumbing. Everyone else brings the ideas.
Everything OpenAI announced at DevDay 2025: AgentKit, Apps SDK, ChatGPT, and more Related: OpenAI launches AgentKit to help developers build and ship AI agents OpenAI ramps up developer push with more powerful models in its API OpenAI’s DevDay 2025 reframed ChatGPT as an app platform and agent OS, debuting Apps inside ChatGPT, a preview Apps SDK, and AgentKit. Apps run directly in ChatGPT responses with interactive UIs, video, login, and actions via the Model Context Protocol (MCP). Launch partners include Canva, Zillow, Coursera, Figma, Spotify, Booking.com, and Expedia, with DoorDash, Instacart, Uber, and AllTrails “coming soon.” Live demos showcased end-to-end “talking to apps”: generating a poster in Canva, auto-building a pitch deck, and pulling Zillow listings with natural-language filters and maps, including full-screen renders inside ChatGPT. Other announcements in dev day included: AgentKit rolled out alongside Agent Builder (a visual “Canva for agents”), ChatKit (an embeddable chat UI), Evals for Agents (step-trace grading, datasets, automated prompt optimization, external-model evals), and a Connectors registry with admin controls.
The list of launch partners is a telling mix of convenience and utility. Canva, Zillow, DoorDash. These aren't AI startups.
They are established businesses looking for a new front door. OpenAI is providing the foyer.
It's a smart, defensive play. The raw intelligence of their models is becoming a commodity. The real value, and the real lock-in, will be the ecosystem built around it. AgentKit and the SDK are the fence they're building.
Whether developers will flock to build inside another company's walled garden, even one with ChatGPT's traffic, is the open question. They've laid out the tools and the ambition. Now they need the apps to prove the platform is more than a feature.
Further Reading
- OpenAI Unveils ChatGPT App Store: Integrations, Hardware and AI Future - WebProNews
- OpenAI for Developers in 2025 - OpenAI Developers Blog
- Developers can now submit apps to ChatGPT - OpenAI
- OpenAI DevDay 2025 - OpenAI
- OpenAI launches app submissions and rolls out store in the new year - The Decoder
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Common Questions Answered
What is AgentKit and how does it help developers build AI agents?
AgentKit is a new toolkit introduced by OpenAI to simplify the development of AI agents for developers. It provides tools and resources that make it easier to create intelligent agents that can interact more effectively within the ChatGPT ecosystem.
How does the new Apps SDK transform ChatGPT's functionality?
The Apps SDK allows developers to create interactive applications that run directly within ChatGPT responses, effectively transforming ChatGPT from a conversational AI into a full-fledged application platform. These apps can include features like interactive UIs, video, login capabilities, and actions via the Model Context Protocol (MCP).
What strategic shift is OpenAI making with its developer tools at DevDay 2025?
OpenAI is repositioning ChatGPT from a simple conversational interface to a comprehensive application platform and operating system for intelligent agents. By introducing AgentKit and the Apps SDK, the company is enabling developers to create more sophisticated and interactive AI-powered applications within the ChatGPT environment.
