Get public usage rates

{
  "chat_per_token": 0,
  "currency": "USD",
  "free_tier_credits": 0,
  "recorded_transcription_per_hour": 0,
  "redaction_per_token": 0,
  "streaming_transcription_per_hour": 0,
  "summarization_per_token": 0,
  "translation_per_token": 0,
  "tts_per_1000_characters": 0
}