OpenCode alternatives

Short answer: the closest OpenCode alternatives are the Codex CLI and Gemini CLI, which are also open source, and Claude Code, which isn't but is the only way to use a Claude subscription in a coding agent. Cursor and GitHub Copilot suit people who want an editor. If you like OpenCode but want it next to other agents, Coagy Local runs OpenCode, Claude Code, Codex and Cursor side by side for free.

What OpenCode is good at

OpenCode is an MIT-licensed terminal agent with about 226k GitHub stars, plus a desktop app in beta for Mac, Windows and Linux. Its big draw is choice: it works with any model provider, accepts GitHub Copilot and ChatGPT Plus or Pro sign-in, and is free with your own keys. Optional OpenCode Go plans cost $10 or $40 a month, or $20 per member for teams.

If that's what you want, OpenCode is hard to beat, and you may not need an alternative.

Why people look elsewhere

• No Claude subscription login. Anthropic blocks third-party tools from using Claude Pro and Max logins (The Register). In OpenCode, Claude means paying API rates with a key. If you already pay for Claude Max, Claude Code is the way to use it.
• No built-in worktrees. OpenCode's docs have no worktree flag; the SDK can create them, and community plugins fill the gap. Claude Code, Codex and Cursor do it out of the box.
• Desktop app is still beta.

The alternatives

Tool	Open source	Uses your subscription	Built-in worktrees	Paid plans start at
OpenCode	Yes (MIT)	ChatGPT, Copilot; not Claude	Via SDK or plugins	Free with keys; Go $10/mo
Codex CLI	Yes (Apache-2.0)	ChatGPT	Yes, in the app	Go, $8/mo
Gemini CLI	Yes (Apache-2.0)	Code Assist license	Experimental	Code Assist or paid API key
Claude Code	No	Claude	Yes	Pro, $20/mo
Cursor	No	Cursor plan	Yes	Plus, $8/mo

Codex CLI. The nearest open source swap. The Codex CLI is Apache-2.0, runs on OpenAI models with your ChatGPT plan (Go $8, Plus $20, Business $25 per user, pricing) or any API key. The Codex app runs each thread in its own worktree, and Codex Cloud runs tasks in the background, though not with an API key.

Gemini CLI. Open source with about 109k stars. Since June 18, 2026 it only serves Gemini Code Assist Standard or Enterprise licenses and paid API or Vertex keys; free and Google AI Pro users move to Antigravity CLI, which is closed source.

Claude Code. Not open source and Claude only, but it's the most used agent in the Stack Overflow 2026 survey (66%), and it works with your Pro ($20), Max ($100) or Ultra ($200) plan (pricing). See OpenCode vs Claude Code.

Cursor. An editor with a CLI and cloud agents. Since October 2026 plans center on Grok, with Claude, GPT and Gemini at API list price on top (pricing).

GitHub Copilot. Agent mode in VS Code and a cloud agent. You can also keep OpenCode and sign in with Copilot.

Keep OpenCode and add the others

Many people don't really want to leave OpenCode. They want Claude Code for one kind of task and OpenCode for another, without juggling terminals.

Coagy Local does that: a free app, no account, that runs OpenCode, Claude Code, Codex, Cursor and more side by side on your computer, each task optionally in its own worktree. It runs on macOS (Apple Silicon) and Linux.

For a team, Coagy's shared workspace shows every developer's Claude Code, Codex, Gemini CLI and Cursor sessions in one place, each on their own subscription, free for up to 4 developers. See how to run several agents in parallel.

Questions

What is the best open source alternative to OpenCode?

The Codex CLI from OpenAI (Apache-2.0) is the closest, and works with a ChatGPT plan or an API key. Gemini CLI is also Apache-2.0, but since June 18, 2026 it needs a Gemini Code Assist license or a paid API key.

Can I use my Claude Pro or Max subscription in OpenCode?

No. Anthropic blocks third-party tools from using Claude subscription logins. OpenCode can use Claude through an API key. To use a Claude subscription, use Claude Code.

Is OpenCode free?

Yes, it is MIT licensed and free with your own model keys. OpenCode Go is an optional paid plan at $10 or $40 a month, or $20 per member for teams.

Can I run OpenCode and Claude Code side by side?

Yes. Coagy Local is a free app with no account that runs OpenCode, Claude Code, Codex, Cursor and more side by side on your own computer, each task optionally in its own git worktree.