OpenCode

What we found

OpenCode is an open-source AI coding agent for the terminal, desktop and IDE, built by Anomaly, the San Francisco team behind the SST framework. The code is MIT-licensed on GitHub and written in TypeScript, and the project moves quickly: OpenCode 2 arrived on 11 October 2026 with a new installer and an upgrade command for existing users.

Its appeal is choice. OpenCode talks to more than 75 model providers through Models.dev, local models included, and you can sign in with an existing GitHub Copilot or ChatGPT Plus or Pro account instead of pasting keys; some free models come built in. Installation is one line in a terminal, or a package from npm, Homebrew and others. Inside, it loads language servers automatically, runs several agent sessions in parallel, keeps snapshots so changes can be undone, and offers a Plan agent that analyses code without editing it. A GitHub integration lets you mention it in issues and pull requests and have it work through GitHub Actions. Anomaly says it stores none of your code or context, and claims more than 16 million developers use it each month.

The paid parts are about models rather than the agent. Zen is a pay-as-you-go gateway to models the team has tested, topped up in $20 steps and hosted in the US. Go costs $10 a month and Go Plus $40, bundling curated coding models with usage limits per model that reset over five hours, a week and a month. An enterprise plan adds single sign-on and gateway integration.

Earlier versions of this page described OpenCode as a fork that split from Charm after a dispute. That was wrong: Charm's Crush continues a different, older Go project of the same name, and OpenCode has its own codebase.

For developers who want a capable, model-agnostic coding agent they can inspect and run anywhere, OpenCode is one of the strongest open options. Expect frequent releases and occasional breaking changes.

Compiled by RECATOOLS from public sources: vendor documentation and pricing, code repositories and published reporting.