curl --request GET \
  --url https://api.gbase.ai/v1/robots/{ai_id}/realtime-cost/sessions \
  --header 'Authorization: Bearer <token>'

{
  "bot_id": "<string>",
  "model": "<string>",
  "session_count": 123,
  "total_cost": 123,
  "sessions": [
    {
      "session_id": "<string>",
      "created_at": "2023-11-07T05:31:56Z",
      "bot_id": "<string>",
      "provider": "<string>",
      "bot_name": "<string>",
      "user_identifier": "<string>",
      "language": "<string>",
      "turn_count": 0,
      "duration_ms": 0,
      "total_tokens": 0,
      "input_text_tokens": 0,
      "input_audio_tokens": 0,
      "cached_tokens": 0,
      "output_text_tokens": 0,
      "output_audio_tokens": 0,
      "total_cost": 0
    }
  ],
  "start_time": "2023-11-07T05:31:56Z",
  "end_time": "2023-11-07T05:31:56Z"
}