TTS-1 HD API Pricing

TTS-1 HD pricing by provider

3 listings across 2 providers. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.

What TTS-1 HD costs in practice

Narrating 500,000 characters

Use TTS-1 HD with LiteLLM

Call TTS-1 HD through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/audio/speech. LiteLLM tracks the cost of every request at these prices.

from litellm import speech

response = speech(
    model="tts-1-hd",
    input="Hello from LiteLLM",
    voice="alloy",
)

model_list:
  - model_name: tts-1-hd
    litellm_params:
      model: tts-1-hd
      api_key: os.environ/OPENAI_API_KEY

curl http://0.0.0.0:4000/v1/audio/speech \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-1234" \
  -d '{
    "model": "tts-1-hd",
    "input": "Hello from LiteLLM",
    "voice": "alloy"
  }'

TTS-1 HD FAQ

More OpenAI models

• TTS-1$15 per 1M characters
• GPT-4o Mini TTS$0.00025 per second
• GPT-6.1 Sol$2 / $10 per 1M tokens
• GPT-6 Luna$0.10 / $0.50 per 1M tokens
• GPT-6 Sol$2 / $10 per 1M tokens
• GPT-5.4 High$2.50 / $15 per 1M tokens
• GPT-5.4 Low$2.50 / $15 per 1M tokens
• GPT-5.6 Sol Disc$4 / $20 per 1M tokens