# OpenAI Plugin Extensions: Build Apps Inside ChatGPT

> Source: <https://byteiota.com/openai-plugin-extensions-build-apps-inside-chatgpt/>
> Published: 2026-09-29 23:10:19+00:00

OpenAI Plugin Extensions let developers build sidebar apps, panels, and file viewers inside ChatGPT. Custom GPTs retire December 11, 2026. Here is what to do.

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OpenAI Plugin Extensions: Build Apps Inside ChatGPT
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