base on Run Claude Code on OpenAI models # Anthropic API Proxy for Gemini & OpenAI Models 🔄 **Use Anthropic clients (like Claude Code) with Gemini, OpenAI, or direct Anthropic backends.** 🤝 A proxy server that lets you use Anthropic clients with Gemini, OpenAI, or Anthropic models themselves (a transparent proxy of sorts), all via LiteLLM. 🌉  ## Quick Start ⚡ ### Prerequisites - OpenAI API key 🔑 - Google AI Studio (Gemini) API key (if using Google provider) 🔑 - [uv](https://github.com/astral-sh/uv) installed. ### Setup 🛠️ #### From source 1. **Clone this repository**: ```bash git clone https://github.com/1rgs/claude-code-proxy.git cd claude-code-proxy ``` 2. **Install uv** (if you haven't already): ```bash curl -LsSf https://astral.sh/uv/install.sh | sh ``` *(`uv` will handle dependencies based on `pyproject.toml` when you run the server)* 3. **Configure Environment Variables**: Copy the example environment file: ```bash cp .env.example .env ``` Edit `.env` and fill in your API keys and model configurations: * `ANTHROPIC_API_KEY`: (Optional) Needed only if proxying *to* Anthropic models. * `OPENAI_API_KEY`: Your OpenAI API key (Required if using the default OpenAI preference or as fallback). * `GEMINI_API_KEY`: Your Google AI Studio (Gemini) API key (Required if PREFERRED_PROVIDER=google). * `PREFERRED_PROVIDER` (Optional): Set to `openai` (default), `google`, or `anthropic`. This determines the primary backend for mapping `haiku`/`sonnet`. * `BIG_MODEL` (Optional): The model to map `sonnet` requests to. Defaults to `gpt-4.1` (if `PREFERRED_PROVIDER=openai`) or `gemini-2.5-pro-preview-03-25`. Ignored when `PREFERRED_PROVIDER=anthropic`. * `SMALL_MODEL` (Optional): The model to map `haiku` requests to. Defaults to `gpt-4.1-mini` (if `PREFERRED_PROVIDER=openai`) or `gemini-2.0-flash`. Ignored when `PREFERRED_PROVIDER=anthropic`. **Mapping Logic:** - If `PREFERRED_PROVIDER=openai` (default), `haiku`/`sonnet` map to `SMALL_MODEL`/`BIG_MODEL` prefixed with `openai/`. - If `PREFERRED_PROVIDER=google`, `haiku`/`sonnet` map to `SMALL_MODEL`/`BIG_MODEL` prefixed with `gemini/` *if* those models are in the server's known `GEMINI_MODELS` list (otherwise falls back to OpenAI mapping). - If `PREFERRED_PROVIDER=anthropic`, `haiku`/`sonnet` requests are passed directly to Anthropic with the `anthropic/` prefix without remapping to different models. 4. **Run the server**: ```bash uv run uvicorn server:app --host 0.0.0.0 --port 8082 --reload ``` *(`--reload` is optional, for development)* #### Docker If using docker, download the example environment file to `.env` and edit it as described above. ```bash curl -O .env https://raw.githubusercontent.com/1rgs/claude-code-proxy/refs/heads/main/.env.example ``` Then, you can either start the container with [docker compose](https://docs.docker.com/compose/) (preferred): ```yml services: proxy: image: ghcr.io/1rgs/claude-code-proxy:latest restart: unless-stopped env_file: .env ports: - 8082:8082 ``` Or with a command: ```bash docker run -d --env-file .env -p 8082:8082 ghcr.io/1rgs/claude-code-proxy:latest ``` ### Using with Claude Code 🎮 1. **Install Claude Code** (if you haven't already): ```bash npm install -g @anthropic-ai/claude-code ``` 2. **Connect to your proxy**: ```bash ANTHROPIC_BASE_URL=http://localhost:8082 claude ``` 3. **That's it!** Your Claude Code client will now use the configured backend models (defaulting to Gemini) through the proxy. 🎯 ## Model Mapping 🗺️ The proxy automatically maps Claude models to either OpenAI or Gemini models based on the configured model: | Claude Model | Default Mapping | When BIG_MODEL/SMALL_MODEL is a Gemini model | |--------------|--------------|---------------------------| | haiku | openai/gpt-4o-mini | gemini/[model-name] | | sonnet | openai/gpt-4o | gemini/[model-name] | ### Supported Models #### OpenAI Models The following OpenAI models are supported with automatic `openai/` prefix handling: - o3-mini - o1 - o1-mini - o1-pro - gpt-4.5-preview - gpt-4o - gpt-4o-audio-preview - chatgpt-4o-latest - gpt-4o-mini - gpt-4o-mini-audio-preview - gpt-4.1 - gpt-4.1-mini #### Gemini Models The following Gemini models are supported with automatic `gemini/` prefix handling: - gemini-2.5-pro-preview-03-25 - gemini-2.0-flash ### Model Prefix Handling The proxy automatically adds the appropriate prefix to model names: - OpenAI models get the `openai/` prefix - Gemini models get the `gemini/` prefix - The BIG_MODEL and SMALL_MODEL will get the appropriate prefix based on whether they're in the OpenAI or Gemini model lists For example: - `gpt-4o` becomes `openai/gpt-4o` - `gemini-2.5-pro-preview-03-25` becomes `gemini/gemini-2.5-pro-preview-03-25` - When BIG_MODEL is set to a Gemini model, Claude Sonnet will map to `gemini/[model-name]` ### Customizing Model Mapping Control the mapping using environment variables in your `.env` file or directly: **Example 1: Default (Use OpenAI)** No changes needed in `.env` beyond API keys, or ensure: ```dotenv OPENAI_API_KEY="your-openai-key" GEMINI_API_KEY="your-google-key" # Needed if PREFERRED_PROVIDER=google # PREFERRED_PROVIDER="openai" # Optional, it's the default # BIG_MODEL="gpt-4.1" # Optional, it's the default # SMALL_MODEL="gpt-4.1-mini" # Optional, it's the default ``` **Example 2: Prefer Google** ```dotenv GEMINI_API_KEY="your-google-key" OPENAI_API_KEY="your-openai-key" # Needed for fallback PREFERRED_PROVIDER="google" # BIG_MODEL="gemini-2.5-pro-preview-03-25" # Optional, it's the default for Google pref # SMALL_MODEL="gemini-2.0-flash" # Optional, it's the default for Google pref ``` **Example 3: Use Direct Anthropic ("Just an Anthropic Proxy" Mode)** ```dotenv ANTHROPIC_API_KEY="sk-ant-..." PREFERRED_PROVIDER="anthropic" # BIG_MODEL and SMALL_MODEL are ignored in this mode # haiku/sonnet requests are passed directly to Anthropic models ``` *Use case: This mode enables you to use the proxy infrastructure (for logging, middleware, request/response processing, etc.) while still using actual Anthropic models rather than being forced to remap to OpenAI or Gemini.* **Example 4: Use Specific OpenAI Models** ```dotenv OPENAI_API_KEY="your-openai-key" GEMINI_API_KEY="your-google-key" PREFERRED_PROVIDER="openai" BIG_MODEL="gpt-4o" # Example specific model SMALL_MODEL="gpt-4o-mini" # Example specific model ``` ## How It Works 🧩 This proxy works by: 1. **Receiving requests** in Anthropic's API format 📥 2. **Translating** the requests to OpenAI format via LiteLLM 🔄 3. **Sending** the translated request to OpenAI 📤 4. **Converting** the response back to Anthropic format 🔄 5. **Returning** the formatted response to the client ✅ The proxy handles both streaming and non-streaming responses, maintaining compatibility with all Claude clients. 🌊 ## Contributing 🤝 Contributions are welcome! Please feel free to submit a Pull Request. 🎁 ", Assign "at most 3 tags" to the expected json: {"id":"14659","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"