OpenAI: TTS-1 HD

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.

Text-to-speech model optimized for audio quality. Double the price of tts-1.
ModalitiesTextAudio
Price$0.012 per 1K charactersAll OpenAI API pricing
ReleasedNov 6, 2023

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.

ProviderPriceUnitLatencyThroughput
OpenAI$0.012per 1K characters3.33s—

Capabilities (1)

Streaming

Supported parameters (3)

voiceresponse_formatspeed

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.

Price
$0.012
per 1K characters · standard price $0.030
Current discount
60%
off every rate
RateStandard priceChargedUnit
Per 1K characters$0.030$0.012per 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.

Success rate (30 days)
7.50%
over 147 completed requests
Days with traffic
29
of the last 30 days

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?
Text-to-speech model optimized for audio quality. Double the price of tts-1.
How much does TTS-1 HD cost?
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). You pay per request, with no subscription.
How do I call TTS-1 HD through the API?
Send a POST request to https://api.oxyy.ai/v1/audio/speech with "model": "tts-1-hd", authenticated with your Oxyy API key. Put the text in "input" and choose a "voice"; the response body is the audio file.
What inputs and outputs does TTS-1 HD support?
TTS-1 HD accepts text as input and returns audio.
When was TTS-1 HD released?
TTS-1 HD was released on Nov 6, 2023.
What other models does OpenAI have?
OpenAI also offers GPT-4o Mini TTS, TTS-1, chat-latest and GPT-4o through Oxyy.

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.

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