A cheat sheet to slash commands in GitHub Copilot CLI
… Claude Sonnet 4.5 1x default current 2. Claude Opus 4.5 Preview 1x 3. Claude Haiku 4.5 0.33x 4. Claude Sonnet 4 1x 5. GPT-5.1 1x 6. GPT-5.1-Codex-Mini 0.33x 7. GPT-5.1-Codex 1x 8. …
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Major agentic capabilities improvements in GitHub Copilot for JetBrains IDEs - GitHub Changelog
… Copilot automatically discovers and loads agent instruction files that you’ve defined into context during agent workflows, from the current workspace or globally across all workspaces. This includes Copilot custom instruction files, file-based instructions, AGENTS.md , and CLAUDE.md . …
Claude Sonnet 4 deprecated - GitHub Changelog
… Model Deprecation date Suggested alternative Claude Sonnet 4 2026-05-06 Claude Sonnet 4.6 Please update your workflows and integrations to use supported models. …
Improving token efficiency in GitHub Agentic Workflows
… Nine of the 12 workflows received optimizer-recommended changes. We include results only for workflows with at least eight runs in both the pre- and post-optimization periods. These are: Auto-Triage Issues, Daily Compiler Quality, Community Attribution, Security Guard, and Smoke Claude. …
Upcoming deprecation of Claude Sonnet 4 in GitHub Copilot - GitHub Changelog
… We will deprecate the following model across all GitHub Copilot experiences including Copilot Chat, inline edits, ask and agent modes, and code completions on 5/6/2026: Model Deprecation date Suggested alternative Claude Sonnet 4 2026-05-06 Claude Sonnet 4.6 Please update your workflows and integra… …
Claude Opus 4.7 is generally available - GitHub Changelog
… You’ll be able to select the model in the model picker in: Visual Studio Code Visual Studio Copilot CLI GitHub Copilot Cloud Agent github.com GitHub Mobile IOS and Android JetBrains Xcode Eclipse Rollout will be gradual. …
Product Archives
… Code referencing now generally available in GitHub Copilot and with Microsoft Azure AI Announcing the general availability of code referencing in GitHub Copilot and Microsoft Azure AI, allowing developers to permit code suggestions containing public code matches while receiving detailed information… …
GitHub Copilot CLI combines model families for a second opinion
… Here’s what we found: Claude Sonnet 4.6 paired with Rubber Duck running GPT-5.4 achieved a resolution rate approaching Claude Opus 4.6 running alone, closing 74.7% of the performance gap between Sonnet and Opus. …
Agent activity in GitHub Issues and Projects - GitHub Changelog
… Agent sessions under assignees in GitHub Issues When a coding agent e.g., Copilot, Claude, or Codex is assigned to an issue, its session now appears directly under the assignee in the sidebar. …
Building an emoji list generator with the GitHub Copilot CLI
… Related posts AI & ML Improving token efficiency in GitHub Agentic Workflows Agentic workflows that run on every pull request can quietly accumulate large API bills. Here’s how we instrumented our own production workflows, found the inefficiencies, and built agents to fix them. …