Last refreshed 2026-06-07. Next refresh: weekly.
Why use TTS-1 on OpenAI API?
OpenAI API offers TTS-1 with pay-as-you-go pricing at $15.00/1M input tokens. OpenAI is a leading AI research and deployment company dedicated to developing safe and beneficial artificial general intelligence (AGI) for humanity.
Setup recipe
Python + curlpip install openaiexport OPENAI_API_KEY=...import os
from openai import OpenAI
client = OpenAI() # reads OPENAI_API_KEY from env
response = client.chat.completions.create(tts-1Request example
import os
from openai import OpenAI
client = OpenAI() # reads OPENAI_API_KEY from env
response = client.chat.completions.create(
model="tts-1",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use the model slug directly, e.g. "gpt-4o" or "gpt-4.1-mini".
- The examples expect OPENAI_API_KEY; rename it only if your application config maps the new variable.
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $15.00 |
Capabilities
About TTS-1
TTS-1 is OpenAI's text-to-speech model optimized for real-time, low-latency applications, released at DevDay November 2023. Accepts text input up to 4,096 characters and outputs audio in MP3, OPUS, AAC, FLAC, WAV, or PCM. Offers 6 preset voices (alloy, echo, fable, onyx, nova, shimmer). Lower output quality than TTS-1 HD but faster. Priced at $15.00/1M characters. API ID: tts-1.
FAQ
What API model ID do I use for TTS-1 on OpenAI API?
Use the model ID tts-1 when calling OpenAI API's API.
Who created TTS-1?
TTS-1 was created by OpenAI as part of the OpenAI Text-to-Speech model family.
Is TTS-1 open source?
TTS-1 is not open source; the seed data lists it as proprietary.