# GitHub Copilot weekly releases — September 21

> Source: <https://github.blog/changelog/2026-09-25-github-copilot-weekly-releases-september-21>
> Published: 2026-09-25 16:42:48+00:00

Release

# GitHub Copilot weekly releases — September 21

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](#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](#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](https://docs.github.com/copilot/how-tos/copilot-integrations/integrate-cloud-agent-with-slack) and [Teams](https://docs.github.com/copilot/how-tos/copilot-integrations/integrate-cloud-agent-with-teams).

### [GitHub Copilot in JetBrains](#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](https://code.visualstudio.com/updates/v1_139).