Using Claude Code with Gemini 2.5 Pro using Claude Code Router (ccr)

Using Claude Code with Gemini 2.5 Pro using Claued Coder Router (ccr).md

Using Claude Code with Gemini 2.5 Pro using Claude Code Router (ccr)

Install Claude Code

pnpm install -g @anthropic-ai/claude-code
pnpm install -g @musistudio/claude-code-router

Edit ~/.claude-code-router/config.json

nvim '~/.claude-code-router/config.json'

I'll use the api endpoint mentioned here

{
  "OPENAI_API_KEY": "$OPENAI_API_KEY",
  "GEMINI_API_KEY": "${GEMINI_API_KEY}",
  "Providers": [
    {
      "name": "openai",
      "api_base_url": "https://ai.google.dev/gemini-api/docs/openai",
      "api_key": "$OPENAI_API_KEY",
      "models": ["gpt-5", "gpt-5-mini"]
    }
  ]
}

The ${GEMINI_API_KEY} or $OPENAI_API_KEY allows to load api keys from env. Or you could hard code it.

or instead use

{
  "name": "openrouter",
  "api_base_url": "https://openrouter.ai/api/v1/chat/completions",
  "api_key": "sk-xxx",
  "models": [
    "google/gemini-2.5-pro-preview",
    "anthropic/claude-sonnet-4",
    "anthropic/claude-3.5-sonnet"
  ],
  "transformer": { "use": ["openrouter"] }
}

Running Claude Code

Run claude code

ccr code

or use the ui

ccr ui