GitHub Copilot weekly releases — September 21

GitHub's September 21 Copilot weekly release added Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and Grok 4.7 to Copilot plans, with Claude Opus 5.5 and GPT-6 Sol limited to Pro+, Max, Business, and Enterprise while GPT-6 Luna and Grok 4.7 also reach Copilot Pro. The same release brought local sandboxing to the Copilot app in public preview, letting users limit agents' access to files, networks, and credentials, plus OpenTelemetry agent-activity tracking configured through enterprise-managed settings. Copilot in JetBrains gained assisted approvals in public preview for agent sessions, and VS Code 1.139 added agent support in Dev Containers on SSH, Tunnel, and WSL hosts.

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 .