GitHub Copilot weekly releases — September 21

Release

This week’s releases add new models to Copilot, local sandboxing in the Copilot app, and updates to Copilot in Slack, Microsoft Teams, JetBrains, and VS Code.

GitHub Copilot

• Claude Opus 5.5 is available to Copilot Pro+, Max, Business, and Enterprise plans.
• GPT-6 Sol is available to Copilot Pro+, Max, Business, and Enterprise plans.
• GPT-6 Luna is available to Copilot Pro, Pro+, Max, Business, and Enterprise plans.
• Grok 4.7 is available to Copilot Pro, Pro+, Max, Business, and Enterprise plans.

GitHub Copilot app

• Limit agents’ access to files, networks, and credentials with local sandboxing, now in public preview.
• Track agent activity in your existing monitoring tools with OpenTelemetry, configured through enterprise-managed settings.

Download [the Copilot app](https://github.com/features/ai/github-app?utm_source=download-app-09-07&utm_medium=changelog&utm_campaign=weekly-copilot-launches-aug-2026).

### [GitHub Copilot in Slack and Microsoft Teams](#github-copilot-in-slack-and-microsoft-teams)

• Choose the best model for each task. Switch models mid-conversation, and Copilot keeps your choice for the rest of the thread. In Slack, you can also set channel defaults.
• Avoid duplicate issues since Copilot now checks for similar existing issues before creating a new one.
• Follow longer-running tasks more easily with clearer implementation-plan status, better recovery from interrupted or stale replies, and more predictable reconnection when a conversation goes idle.
• Give Copilot more context in Slack by sharing supported files, attachments, and message links.

Learn more about GitHub Copilot public previews in Slack and Teams.

GitHub Copilot in JetBrains

• Assisted approvals, now in public preview for Copilot agent sessions, automatically approve low-risk tool calls while prompting you for higher-risk actions.
• Edit an earlier message to redirect an agent session and Copilot rewinds both the conversation and file changes before sending the replacement request.
• Shared organization and enterprise skills, along with organization-managed custom instructions, now work in local and Copilot agent sessions.

Learn more in the [full Copilot in JetBrains changelog](https://github.blog/changelog/2026-09-22-new-features-and-improvements-in-copilot-for-jetbrains/).

### [GitHub Copilot in VS Code 1.139 release](#github-copilot-in-vs-code-1-139-release)

• Run agents in Dev Containers on SSH, Tunnel, and WSL hosts, using your remote project’s tools and dependencies. Support is rolling out gradually.
• Keep busy session lists organized with Compact View, filters to hide empty groups, and the ability to rename sessions and chats directly in the list.
• Choose between separate chat tabs or a single active-chat view within a session, without losing your conversations. This layout option is now in preview.

Explore everything that’s new in the full release notes.