Arena API

ℹ️ Click "Connect Arena Account" to authenticate. A small tab will open, automatically get your auth tokens, then stay open to keep your session alive.

📚 API Usage

POST /api/chat?key=YOUR_API_KEY
Content-Type: application/json

{
  "message": "Hello!",
  "model": "claude-opus-4-6"
}

The response will be Server-Sent Events (SSE) with streaming data:

data: {"type":"text","data":"Hello"}
data: {"type":"text","data":" there"}
data: {"type":"done","data":null}

Available models: claude-opus-4-6, claude-opus-4-6-thinking, gpt-5.1, gemini-3-pro, and 30+ more.