Source record

Published by GitHub Changelog (T1 source). The original is at https://github.blog/changelog/2026-09-25-github-copilot-weekly-releases-september-21.

Pipeline notes

The summary and note below are generated by the signal pipeline — they are Beyond Desk’s reading, not quotations from the source.

GitHub Changelog roundup of Copilot weekly releases for September 21: new models including Claude Opus added, local sandboxing introduced in the Copilot app, plus updates to Copilot in Slack, Microsoft Teams, JetBrains, and VS Code.

Tracks incremental Copilot surface area across IDEs and chat clients, useful for keeping an inventory of which model and sandbox features are now live.

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