Changelog: chatgpt.com (20260909 → 20260910)

Official release notes

• Library sharing — Share files and folders from Library with specific people (Viewer/Editor) or the whole workspace; manage access in the sharing dialog; find items under Shared with me and use them in chats. Shared-folder ownership rules clarified (uploads stay with the folder owner if access is later revoked).
• Deep Research in ChatGPT Work and Codex — Deep research now in Work and Codex (web, desktop, iOS, Android for Plus/Pro/Business/Enterprise/Edu with Work). Research across web, files, and connected apps into an editable cited document; steer mid-run; request document/presentation/spreadsheet/Site when tools allow. Start with @Deep Research or an explicit ask; uses Work/Codex allowance (Chat deep-research limits unchanged). Learn more. Related voice docs still point at ChatGPT voice.

Product flags

• Side panel / layout: sidepanel_enabled added.
• Mobile streaming: app_block_mobile_streaming added.
• Removed: chatgpt.go.

Experiments / gates

• +3 hashed Statsig gates; −1 hashed dynamic config. No other readable experiment surface.

Marketing surface

• Sitemap lastmod bumps only (/work, Codex college pages, /business/ai-for-finance, /use-cases/science-medicine) — no new routes.