OpenAI opens ChatGPT platform so developers can build and publish native apps inside it
What happened
At Dev Day on September 30, 2026, OpenAI expanded ChatGPT plugins so developers can build app-like experiences inside ChatGPT: plugins get their own sidebar entry, can build interactive panels for operating tools mid-conversation, and support file viewers for developers' own file formats. OpenAI then opened the ChatGPT platform, letting developers build full native apps with plugin extensions and publish them directly in ChatGPT, reaching more than 1.2 billion weekly active users. Plugins appear directly in the conversation. The same day, TechCrunch argued that Dev Day's Dots agent, new models, in-app recommendations and plugin extensions together push against the traditional app store model.
Written by AI from the coverage · updated 2 hours ago
Story line
- Sep 29 · 8 reports · RoundupOpenAI DevDay 2026 roundup: Dots, GPT-6.1 Sol and 20-plus launches
- Sep 30 · 3 reports · This story
OpenAI opens ChatGPT platform so developers can build and publish native apps inside it
Coverage
Follow the reports to see the story from different sides.
- TechCrunch · AIPickOpenAI's new features take aim at the app store model
TechCrunch argues that OpenAI's Dev Day releases — the Dots agent, new models, in-ChatGPT app recommendations and plugin extensions — together point to pressure on the traditional app store model.
- AI HOT · ProductsPickOpenAI opens ChatGPT platform so developers can build native apps with plugin extensions
OpenAI says it is opening up the ChatGPT platform, letting developers build full native apps with plugin extensions and publish them directly inside ChatGPT. The platform reaches more than 1.2 billion weekly active users, and the plugins appear directly in the conversation.
- TechCrunch · AIOpenAI expands ChatGPT’s plug-ins with app-like interfaces and automations
OpenAI 在 Dev Day 上宣布扩展 ChatGPT 插件能力，允许开发者在 ChatGPT 内构建类应用体验，插件将拥有侧边栏专属入口，并可构建让用户在对话中操作工具的交互面板，支持开发者自有文件格式的文件查看器。
Heat over time
Heat now 13·Comparable peak 20（Sep 30 02:00）·Comparable change over 24 hours –
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