OpenCode

OpenCode is an open-source AI coding agent from Anomaly Innovations, Inc. The vendor reports more than 16 million developers using it each month, 950 contributors and over 13,000 commits, and the repository has 217k GitHub stars. OpenCode runs in the terminal, as a desktop app for macOS, Windows and Linux, and as an extension for VS Code, Cursor, Zed, Windsurf and VSCodium. It is built around model and account flexibility: developers connect any of 75+ LLM providers through Models.dev, including local models, bring their own API keys, or log in with an existing GitHub Copilot account or a ChatGPT Plus or Pro account to use those subscriptions without separate API billing.

Core capabilities include LSP-enabled context that loads the right language servers so the model understands the codebase's types and imports, multi-session parallel execution that runs several agents on one project, share links for sessions, a read-only plan mode and undo and redo for AI-generated edits. OpenCode starts from permissive defaults: the Build agent runs file edits and shell commands without per-step approval, the restricted Plan agent asks before every edit and command, and only repeated identical calls and paths outside the project are gated by default. It acts as an MCP client for local and remote MCP servers, including OAuth for remote servers such as Sentry and Context7. It runs inside CI as well: mentioning /opencode or /oc in a GitHub issue or pull request runs the task on a GitHub Actions runner, and GitLab is supported through CI/CD pipelines or GitLab Duo.

The agent itself is free and MIT licensed, and three optional paid products sit alongside it. OpenCode Go is a $10 per month subscription to a curated set of open coding models, and Go Plus at $40 per month adds higher limits, with included monthly usage that varies by model and an option to fall back to a Zen balance once the limits are reached. OpenCode Zen is a curated model service billed as a prepaid pay-as-you-go balance starting at $20 plus a $1.23 card processing fee, with per-request pricing, optional auto top-up and use with any agent. OpenCode Enterprise adds centralized configuration, SSO and internal AI gateway integration, and is sold per seat on a custom quote, with no token charges when an organization uses its own LLM gateway.

None of the paid products is required, since the agent runs fully featured on bring-your-own keys or a Copilot or ChatGPT login at no cost. What the free agent does not include is model access itself: developers pay their chosen provider directly or through Go or Zen, and manage the keys and accounts involved. Enterprise pricing is not published, and the SOC 2 report and a Data Processing Agreement are released through the Trust Center on request.

OpenCode suits developers who want a free, open-source coding agent that works with the models and subscriptions they already have, and teams that need code and context to stay out of vendor storage. Developers who want one subscription that covers the agent, its model access and support should consider Claude Code or Cursor, and teams that want agent workflows packaged with seat management and admin controls inside GitHub should consider GitHub Copilot.

Current state Q4 2026: OpenCode has 217k GitHub stars with releases landing several times a week, and September 2026 releases added GPT-6 model support and signed macOS release binaries. OpenCode Go is $10 per month, and Go Plus at $40 per month adds higher limits. OpenCode Data publishes a public leaderboard of model usage and cost drawn from Go traffic. Anomaly Innovations, Inc holds a SOC 2 Type 2 report, published through its Comp AI Trust Center at trust.opencode.ai, and its privacy policy sets out rights for California residents under the CCPA. OpenCode does not store code or context data: processing happens locally or through direct API calls to the developer's own provider.