claude-code-free

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/

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

• 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"
  }
}

Download from 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**: Usesudo

on Linux or run as administrator on WindowsAPI errors: Verify yourANTHROPIC_BASE_URL

is correctly set tohttps://opencode.ai/zen

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