About
OpenAI's October 2025 Apps SDK launch is a mainstream Generative UI case because apps now live directly inside ChatGPT conversations. The official announcement describes apps that respond to natural language and render interactive interfaces inside the chat, including maps, playlists, presentations, courses, shopping, and travel surfaces. The SDK extends MCP so developers can define both app logic and interface, making it a concrete reference for conversational products that need native-feeling UI rather than links out to another app.
Summary
1. Chat-native apps: Interactive app surfaces appear inside the conversation rather than behind an external link
2. Natural-language discovery: ChatGPT can suggest or invoke apps when the user's intent fits
3. MCP-based interface layer: Developers define tools, data, and UI through an open app model
4. Large partner signal: Early partners included Booking.com, Canva, Coursera, Expedia, Figma, Spotify, and Zillow
5. Platform-scale GenUI: A high-reach example of Generative UI becoming an app distribution surface