OpenAI Announces ChatGPT Plugin Extensions: Sidebar Launch, Mentions, File Viewers
OpenAI announced ChatGPT plugin extensions (sidebar launch, @ mention calls, file viewers) with a rebuilt submission flow and a sub-two-week review target.
OpenAI's official developer account (@OpenAIDevs) announced ChatGPT plugin extensions in an X thread on October 8, 2026. The core message: plugins can now launch from the sidebar, support @ mentions, and add file viewers.
Image source: @OpenAIDevs on X
The announcement came as a three-post thread. The first post covers the feature overview plus a walkthrough video with @coreyching, the second names eight launch partners building with the extensions, and the third points to a rebuilt plugin submission flow with its submission URL.
Sidebar launch, @ mentions, file viewers
The first post (@OpenAIDevs, 2026-10-08) describes three extension capabilities.
- Launch plugins from the sidebar: plugins can run directly from the sidebar.
- @ mention support: plugins can be invoked with @ mentions.
- Add file viewers: plugins can include file viewers.
The same post shares a walkthrough video link and an embedded video asset featuring @coreyching. The tweet text itself does not include a full step-by-step transcript, so implementation details beyond these three claims need the video itself or the official developer docs.
The official extensions documentation adds availability qualifiers. Web extensions are coming soon to ChatGPT Free and Go users, and composer mentions are available only in the ChatGPT desktop app. The three capabilities above therefore restate the thread's scope, with actual availability and platform subject to those documented qualifiers.
Eight named build partners
The second post names eight partners building with plugin extensions.
- Adobe, Canva, Figma, Shopify, Instacart, Atlassian, tldraw, MagicPathAI
The post also attaches one photo asset. The thread text does not state each partner's plugin behavior or release timing.
Rebuilt submission flow and sub-two-week review target
The third post introduces a rebuilt plugin submission flow and shares the submission URL.
- Submission URL: https://developers.openai.com/plugins/deploy/submission
- Stated emphasis: clearer review feedback
A follow-up reply from @coreyching (2026-10-08) says the team expects a sub-two-week (<2 week) turnaround. The reply also notes surging submission volume and says plugins are reviewed securely before reaching all ChatGPT users. Treat this as a stated review goal from a team member, not a guaranteed SLA.
Sources
- OpenAI Developers (@OpenAIDevs): Plugin extensions announcement thread (1/3)
- OpenAI Developers (@OpenAIDevs): Eight build partners (2/3)
- OpenAI Developers (@OpenAIDevs): Rebuilt submission flow (3/3)
- corey.ching (@coreyching): Sub-two-week review target reply
- OpenAI Developers: Plugin Extensions docs (availability qualifiers)