OpenAI’s DevDay 2025 featured a major focus on vibe coding. The company, which boasts that it now has more than 800 million weekly active users for ChatGPT, announced a variety of new tools for developers during its annual event in San Francisco. Headlining the announcements: the ability to build with apps directly in ChatGPT (including eventually allowing “mature experiences” once age verification is in place) and the introduction of a toolkit that will help users build and deploy their own AI agents.

In OpenAI’s apparent effort to turn ChatGPT into a full-on frontend development environment, the company announced its new Apps SDK (Software Development Kit) that will allow devs to pull in supported third-party apps to complete tasks. In a demo, the company showed ChatGPT working with

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