GitHub Copilot Fusion

GitHub Copilot Fusion is GitHub's AI coding agent that removes the guesswork from model selection. Rather than relying on a single model, Fusion automatically routes each coding task to suitable models and combines them when needed—one model can write code while another reviews or improves it. Developers can choose Standard, High, or Max effort levels to balance speed, quality, and cost. Fusion is available across GitHub Copilot plans in VS Code, Copilot CLI, the Copilot app, and JetBrains IDEs.