> ## Documentation Index
> Fetch the complete documentation index at: https://docs.crazyrouter.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Claude Dev Setup Guide

> Configure Crazyrouter API in the Claude Dev VS Code extension with the latest verified Claude models

> Last updated: 2026-06-06

## Overview

Claude Dev is a VS Code AI coding extension suited for Claude-style code explanation, refactoring suggestions, and multi-turn collaboration through Crazyrouter. For public docs, prefer the OpenAI Compatible route first because it is more consistent with the rest of the Crazyrouter integration stack and easier to troubleshoot.

<Warning>
  The `https://api.crazyrouter.com/v1` URL on this page applies only to Claude Dev's `OpenAI Compatible` provider. Do not copy it into Claude Code's `ANTHROPIC_BASE_URL`; Claude Code should use the root domain `https://api.crazyrouter.com`.
</Warning>

## Recommended Configuration

<Steps>
  <Step title="Install Extension">
    Search for `Claude Dev` in the VS Code extension marketplace and install it.
  </Step>

  <Step title="Open Settings">
    Click the Claude Dev icon in the sidebar to enter settings.
  </Step>

  <Step title="Select Provider">
    Prefer `OpenAI Compatible` as the API provider.
  </Step>

  <Step title="Enter Configuration">
    * **Base URL**: `https://api.crazyrouter.com/v1`
    * **API Key**: `sk-xxx`
    * **Model**: `claude-opus-4-8`
  </Step>
</Steps>

For the default international API entry, set Claude Dev's `OpenAI Compatible` Base URL to `https://api.crazyrouter.com/v1`.

## Recommended Models

| Scenario                       | Model             |
| ------------------------------ | ----------------- |
| Daily coding                   | `claude-opus-4-8` |
| Heavier reasoning and planning | `claude-opus-4-8` |

<Note>
  `claude-opus-4-8` and `claude-opus-4-8` match the latest verified Claude model guidance in this doc set. For the smallest first-pass VS Code validation, start with `claude-opus-4-8`.
</Note>