GitHub has made Anthropic's Claude Haiku 5.5 generally available across GitHub Copilot, including the Copilot app, CLI, and code. The model is designed for fast, high-volume tasks such as subagents and quick edits.
Developers will be able to run agentic coding tasks on-device using MAI-Code-1.1-Flash inside GitHub Copilot without paying inference fees for local model calls.
GitHub has made local sandboxing generally available for GitHub Copilot, isolating command execution with granular controls over files, network access, credentials, and system capabilities.
GitHub announced that GitHub Copilot will soon support intelligent local model routing under Project HydraFusion, automatically directing suitable tasks to local models to help users save AI credits.
In the GitHub Copilot app, the diff, terminal, and browser sit together so reviewers can check, run, and preview agent code without switching tabs. A beginner guide covers using that layout.
GitHub says OpenAIDevs’ GPT-6.1 Sol is now generally available in GitHub Copilot for agentic coding and terminal workflows, including the Copilot app, CLI, and code.
GitHub says Anthropic’s Claude Sonnet 5.5 is now generally available in GitHub Copilot, including the Copilot app, CLI, and code. In GitHub’s early testing, it matched Sonnet 5 on coding tasks while using fewer steps, tokens, and tool calls and finishing faster.
In the GitHub Copilot app, agents can run in parallel, with each session using its own Git worktree and context so building, reviewing, and testing can happen at the same time.
GitHub says the view remains fast and smooth for a pull request with 2,200 files, more than 1 million changed lines, and more than 400 inline comments.
GitHub will host beginner-friendly livestreams starting September 24 on building agentic applications with the GitHub Copilot SDK without implementing the agent loop. The series includes .NET and Java sessions, with sign-up in six languages.
GitHub Copilot now generally offers two additional OpenAIDevs GPT-6 models: GPT-6 Sol for interactive and agentic coding, and GPT-6 Luna, which GitHub calls a lightweight, lowest-cost option for smaller tasks.
AnthropicAI's Claude Opus 5.5 is generally available in GitHub Copilot for agentic coding, long-running agentic tasks, and knowledge work. GitHub's early testing found task resolution comparable to Claude Opus 5, with significantly fewer steps and tokens and fast error recovery on multistep tasks.
GitHub said one engineer and a team of agents ported the GitHub Copilot agent runtime to Rust, shipping 800,000 lines of production code while retaining code quality.
Alberto Gimeno said editable diffs are coming soon to the GitHub Copilot desktop app, so last tweaks can be made directly in the diff while reviewing changes.
