curl --request POST \
  --url https://api.perplexity.ai/chat/completions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "model": "sonar-deep-research",
  "messages": [
    {
      "role": "system",
      "content": "Be precise and concise."
    },
    {
      "role": "user",
      "content": "How many stars are there in our galaxy?"
    }
  ]
}'

{
  "id": "<string>",
  "model": "<string>",
  "created": 123,
  "usage": {
    "prompt_tokens": 123,
    "completion_tokens": 123,
    "total_tokens": 123,
    "search_context_size": "<string>",
    "citation_tokens": 123,
    "num_search_queries": 123,
    "reasoning_tokens": 123
  },
  "object": "chat.completion",
  "choices": [
    {
      "index": 123,
      "finish_reason": "stop",
      "message": {
        "content": "<string>",
        "role": "system"
      }
    }
  ],
  "search_results": [
    {
      "title": "<string>",
      "url": "<string>",
      "date": "2023-12-25"
    }
  ],
  "videos": [
    {
      "url": "<string>",
      "thumbnail_url": "<string>",
      "thumbnail_width": 123,
      "thumbnail_height": 123,
      "duration": 123
    }
  ]
}