# claude-code-free

> Source: <https://gist.github.com/simrotion13/37b329da1372368328c80b753ed65b8b>
> Published: 2026-05-14 19:06:39+00:00

Quick reference guide for setting up Claude Code with OpenCode

OpenCode is an AI-powered coding assistant CLI tool that helps with software engineering tasks. It uses various LLM providers including Anthropic Claude.

**Website**: [https://opencode.ai/](https://opencode.ai/)

Claude Code is Anthropic's official CLI tool for interacting with Claude AI. It can be configured to use OpenCode's free API endpoint instead of Anthropic's direct API.

**Product Page**: [https://claude.com/product/claude-code](https://claude.com/product/claude-code)

- Windows 10/11 Machine Running WSL2 Linux Ubuntu Machine
- Node.js
- OpenCode Zen account

```
sudo apt update
sudo apt install nodejs npm
sudo npm install -g @anthropic-ai/claude-code
```

Edit `~/.claude/settings.json`

:

```
code ~/.claude/settings.json
{
  "env": {
    "ANTHROPIC_BASE_URL": "https://opencode.ai/zen",
    "ANTHROPIC_MODEL": "minimax-m2.5-free",
    "ANTHROPIC_API_KEY": "opencode-api-key",
    "ENABLE_TOOL_SEARCH": "true"
  }
}
```

| Variable | Value | Description |
|---|---|---|
`ANTHROPIC_BASE_URL` |
`https://opencode.ai/zen` |
OpenCode API endpoint |
`ANTHROPIC_MODEL` |
`minimax-m2.5-free` |
Model to use |
`ANTHROPIC_API_KEY` |
`opencode-api-key` |
Your OpenCode API key |
`ENABLE_TOOL_SEARCH` |
`true` |
Enable tool search feature |

| Command | Description |
|---|---|
`claude -helps` |
To check available commands |
`claude -p "<prompt>"` |
Run single prompt |
`claude --version` |
To check current version |

Download from [https://nodejs.org/en/download](https://nodejs.org/en/download) and run the installer.

```
npm install -g @anthropic-ai/claude-code
```

Edit `%USERPROFILE%\.claude\settings.json`

:

```
code $env:USERPROFILE\.claude\settings.json
{
  "env": {
    "ANTHROPIC_BASE_URL": "https://opencode.ai/zen",
    "ANTHROPIC_MODEL": "minimax-m2.5-free",
    "ANTHROPIC_API_KEY": "opencode-api-key",
    "ENABLE_TOOL_SEARCH": "true"
  }
}
```

**Node not found**: Restart terminal after installation or add Node.js to PATH** Permission denied**: Use`sudo`

on Linux or run as administrator on Windows**API errors**: Verify your`ANTHROPIC_BASE_URL`

is correctly set to`https://opencode.ai/zen`

- OpenCode Website:
[https://opencode.ai/](https://opencode.ai/) - Claude Code:
[https://claude.com/product/claude-code](https://claude.com/product/claude-code) - Node.js Downloads:
[https://nodejs.org/en/download](https://nodejs.org/en/download)