Anthropic API Proxy for Gemini & OpenAI Models
A proxy server that lets Anthropic clients such as Claude Code send requests to Gemini or OpenAI models, or to Anthropic itself, by translating between the Anthropic API and each provider through LiteLLM.
claude-code-proxy is a proxy server that lets Anthropic API clients, including Claude Code, work against Gemini, OpenAI or Anthropic models by translating requests through LiteLLM. It can be configured to prefer OpenAI, Google or Anthropic as the backend provider, and maps Claude's haiku and sonnet model names to a configurable big and small model on the chosen backend.
Setup requires cloning the repository and providing the relevant API keys, such as an OpenAI key, a Gemini key, or Google Cloud Application Default Credentials with a configured Vertex AI project and region for Gemini access. Anthropic API access is optional and only needed when proxying directly to Anthropic's own models.
It is written in Python and installs its dependencies with uv.