curl --request POST \
  --url https://ninjachat.ai/api/v1/compare \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model_a": "gpt-5",
  "model_b": "claude-sonnet-4.6",
  "prompt": "Explain the difference between supervised and unsupervised learning."
}
'

{
  "model_a": {
    "id": "<string>",
    "output": "<string>"
  },
  "model_b": {
    "id": "<string>",
    "output": "<string>"
  },
  "cost": {
    "this_request": "$0.006"
  },
  "metadata": {
    "latency_ms": 123
  }
}