OpenAI: TTS-1 HD
OpenAI TTS-1 HD API pricing
TTS-1 HD costs $0.012 per 1K characters on Oxyy. That is the pay-as-you-go price after the current 60% discount (Launch Promo; standard price $0.030). It takes text as input and returns audio. A cheaper OpenAI option is TTS-1 at $0.006 per 1K characters; for every model and rate, see OpenAI API pricing.
Providers
Where this model runs, and what each route costs. Requests are sent to a healthy provider automatically; if one errors, the gateway retries against another serving the same model.
| Provider | Price | Unit | Latency | Throughput |
|---|---|---|---|---|
| OpenAI | $0.012 | per 1K characters | 3.33s | — |
Capabilities (1)
Supported parameters (3)
The endpoint's own fields, shown in the quickstart below, are required as well; a request without them is rejected.
Pricing
What this model costs on Oxyy, pay as you go. "Charged" is the rate a request is billed at; the standard price is shown beside it for reference.
| Rate | Standard price | Charged | Unit |
|---|---|---|---|
| Per 1K characters | $0.030 | $0.012 | per 1K characters |
Discount. Charged rates include the current "Launch Promo" discount of 60% on every rate.
Specifications
- Model ID
tts-1-hd- Developer
- OpenAI
- Type
- Text to speech
- Input
- Text
- Output
- Audio
- Released
- Nov 6, 2023
- Tokenizer
- GPT
- Series
- TTS-1
- Endpoint
/v1/audio/speech
Quickstart
Call tts-1-hd with a POST to /v1/audio/speech on https://api.oxyy.ai, using your Oxyy API key from the OXYY_API_KEY environment variable. The same key works for every model in the catalog.
import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.oxyy.ai/v1",
api_key=os.environ["OXYY_API_KEY"],
)
with client.audio.speech.with_streaming_response.create(
model="tts-1-hd",
voice="alloy",
input="Hello from Oxyy.",
response_format="mp3",
) as response:
response.stream_to_file("speech.mp3")Availability
The share of requests to this model that completed successfully over the last 30 days. Requests the caller cancelled, and requests still in flight, are not counted. When an upstream provider errors, the gateway retries against another provider serving the same model, so a single provider incident does not necessarily show up here.
Days are UTC days. Days with no completed requests are omitted rather than drawn at 100% — no traffic is not evidence of availability.
Frequently asked questions
What is TTS-1 HD?
How much does TTS-1 HD cost?
How do I call TTS-1 HD through the API?
What inputs and outputs does TTS-1 HD support?
When was TTS-1 HD released?
What other models does OpenAI have?
Alternatives to TTS-1 HD
Models of the same kind from other vendors, closest in price first. Prices are pay-as-you-go on Oxyy, through the same API key.


