curl --request POST \
  --url https://api.concentrate.ai/v1/messages/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "messages": [
    {
      "content": "<string>"
    }
  ],
  "max_tokens": 4503599627370495,
  "model": "<string>",
  "provider": "<string>",
  "cache_control": "<unknown>",
  "metadata": {
    "user_id": "<string>"
  },
  "output_config": {
    "format": {
      "type": "json_schema",
      "schema": {}
    }
  },
  "stream": true,
  "system": "<string>",
  "temperature": 0.5,
  "thinking": {
    "type": "enabled",
    "budget_tokens": 1025
  },
  "tool_choice": {
    "type": "auto",
    "disable_parallel_tool_use": true
  },
  "tools": [],
  "top_p": 0.5,
  "container": "<string>",
  "inference_geo": "<string>",
  "service_tier": "<string>",
  "stop_sequences": [
    "<string>"
  ],
  "top_k": 4503599627370495
}
'

{
  "id": "<string>",
  "type": "message",
  "role": "assistant",
  "model": "<string>",
  "content": [
    {
      "type": "text",
      "text": "<string>",
      "cache_control": "<unknown>",
      "citations": [
        {
          "type": "web_search_result_location",
          "title": "<string>",
          "url": "<string>",
          "cited_text": "<string>",
          "encrypted_index": "<string>"
        }
      ]
    }
  ],
  "usage": {
    "cache_creation_input_tokens": 0,
    "cache_read_input_tokens": 0,
    "inference_geo": "<string>",
    "input_tokens": 0,
    "output_tokens": 0,
    "server_tool_use": {
      "web_fetch_requests": 0,
      "web_search_requests": 0
    },
    "cache_creation": {
      "ephemeral_5m_input_tokens": 1,
      "ephemeral_1h_input_tokens": 1
    }
  },
  "cost": {
    "total": 123
  },
  "stop_sequence": "<string>"
}