OpenAI announced plugin extensions at DevDay 2026 that let developers build interactive workspaces inside ChatGPT. Its official recap describes plugins with a place in the sidebar and panels where users can work alongside a conversation.
Developers can also create viewers for the file types their product supports. This is the interface capability described in the recap's Plugin extensions section, which presents it as opening the platform OpenAI uses to build ChatGPT features. The recap does not report any product built this way or any measured result.
