title: "Opencode + Claude: Complete Setup & Usage Guide" description: "Learn how to use opencode with Claude, including setup, API keys, Claude Code differences, and common errors." keywords:

opencode claude
opencode claude code
claude code opencode

Opencode + Claude

Claude is the most popular model used with opencode.

This guide explains how Claude works with opencode, how to set it up correctly, and how to avoid common configuration mistakes.

How opencode uses Claude

Opencode connects to Claude through the Anthropic API.

It does not use Claude Code credentials.

Claude Code vs Claude API

Many users confuse these two.

Claude Code → a hosted coding experience
Claude API → programmatic access (required by opencode)

If you use Claude Code credentials, opencode will fail.

Basic setup

export ANTHROPIC_API_KEY=your_api_key_here

Then run:

opencode

Common issues

This credential is only authorized for use with Claude Code
Anthropic authentication issues

Advanced usage

Use Claude with MCP tools
Combine Claude with Playwright or Figma

→ See Opencode MCP Guide