Copilot News 09/04/2026 AI Rating: Medium

GitHub Copilot's Weekly Roundup Brings Claude Fable 5.1, Gemini 3.8 Flash, and VS Code Agent Merge Preview

#GitHubCopilot#GitHub#ClaudeFable#GeminiFlash#VSCode

GitHub published its week-of-August-31 Copilot release roundup, covering model expansions, a security enhancement, and new VS Code agent features.

Details

  • Model expansions: Claude Fable 5.1 became available to Copilot Pro+, Max, Business, and Enterprise subscribers, while Gemini 3.8 Flash rolled out to Pro, Pro+, Max, Business, and Enterprise users
  • Security: the Copilot app and CLI now honor content exclusion policies, keeping sensitive code out of context across agentic workflows
  • JetBrains: the Copilot harness reached general availability in Copilot for JetBrains, aimed at faster feature rollouts and improved code quality
  • VS Code 1.136: Agent Merge entered public preview, automating pull request preparation by handling review comments, test failures, and conflicts; multi-root workspace support for agent sessions moved to experimental; chat background customization (patterns/images) became experimental; and a new chat sessions view organizes conversations hierarchically and flags ones needing attention

What happened next

The roundup lands the same week Claude Fable 5.1 and Gemini 3.8 Flash both reached Copilot, continuing GitHub’s pattern of bundling multi-provider model rollouts with incremental IDE and security improvements in a single weekly digest.

Source https://github.blog/changelog/2026-09-04-github-copilot-weekly-releases-august-31

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