OpenCode

OpenCode is an open source coding agent that runs on your own machine. It is available as a desktop app for macOS, Windows and Linux, a terminal interface that works in any shell or on a remote server, a mobile app for starting and approving sessions from a phone, and an SDK for driving it from scripts and CI jobs. It works with more than 200 model providers, ships with a set of free models that need no account, and can use existing ChatGPT Plus/Pro or GitHub Copilot subscriptions. Features include multiple sessions, custom agents and commands, agent skills, plugins, MCP servers, permissions and undo/redo. The app is MIT licensed and free to use. OpenCode Go, an optional subscription from $10 a month, adds curated models with higher usage limits. It suits developers who want a model-agnostic coding agent they can customise.