curl --request POST \
  --url https://api.perplexity.ai/chat/completions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "sonar",
  "messages": [
    {
      "role": "system",
      "content": "<string>"
    }
  ]
}
'

{
  "id": "<string>",
  "model": "<string>",
  "created": 123,
  "choices": [
    {
      "index": 123,
      "message": {
        "role": "system",
        "content": "<string>"
      },
      "delta": {
        "role": "system",
        "content": "<string>"
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 123,
    "completion_tokens": 123,
    "total_tokens": 123,
    "cost": {
      "input_tokens_cost": 123,
      "output_tokens_cost": 123,
      "total_cost": 123,
      "reasoning_tokens_cost": 123,
      "request_cost": 123,
      "citation_tokens_cost": 123,
      "search_queries_cost": 123
    },
    "search_context_size": "<string>",
    "citation_tokens": 123,
    "num_search_queries": 123,
    "reasoning_tokens": 123
  },
  "object": "chat.completion",
  "citations": [
    "<string>"
  ],
  "search_results": [
    {
      "title": "<string>",
      "url": "<string>",
      "date": "<string>",
      "last_updated": "<string>",
      "snippet": "",
      "source": "web"
    }
  ],
  "images": [
    {
      "image_url": "<string>",
      "origin_url": "<string>",
      "title": "<string>",
      "width": 123,
      "height": 123
    }
  ],
  "related_questions": [
    "<string>"
  ]
}