OpenAI TTS-1 HD

Name: OpenAI TTS-1 HD
Brand: OpenAI
SKU: openai-tts-1-hd
Price: 0.036 USD
Availability: InStock

Tekst-til-taleTilgjengelig

av OpenAIopenai-tts-1-hd

OpenAI's high-definition TTS model. Better quality for production use cases.

Prøv det Få API-nøkkel Sammenlign

Pris: 0,036 USD/1.000 tegn
Input → output: Tekst → Lyd
Utvikler: OpenAI
Oppdatert: 23. september 2026

Playground

Prøv OpenAI TTS-1 HD

Inndata og resultat

0,036 USD/1.000 tegn

Tekst

Stemme(valgfritt)

Avanserte innstillinger (1)

Format(valgfritt)

⌘/Ctrl + Enter

Resultat

Den genererte talen vises her.

Denne kjøringen

0,0001 USD · 0,01 credits

Ny her?

10 gratis credits (0,10 USD) når du registrerer deg med Google

Kan brukes 24 timer etter registrering, opptil 5 kjøringer per dag og maksimalt 2 credits per kjøring. Andre påloggingsmetoder starter uten credits. Nok for 1 000 kjøringer av denne modellen.

Om OpenAI TTS-1 HD

Kort sagtPer 23. september 2026

OpenAI TTS-1 HD er en modell fra OpenAI i kategorien Tekst-til-tale. På Railwail koster OpenAI TTS-1 HD 0,036 USD per 1.000 tegn.

Bakgrunn

Om OpenAI

Grunnlagt 2015 · San Francisco, California, USA

OpenAI was founded in December 2015 by Sam Altman, Elon Musk, Greg Brockman, Ilya Sutskever, Wojciech Zaremba and John Schulman as a non-profit AI research lab, restructured to capped-profit OpenAI LP in 2019. The company is best known for the GPT, DALL-E and Whisper model families and has raised more than $13B from Microsoft and billions more from Thrive Capital, Sequoia, Khosla and SoftBank, with a 2024 valuation above $157B. The TTS-1 HD model launched together with TTS-1 in November 2023 as the high-quality sibling, intended for offline audiobook, podcast and content-production workflows where fidelity matters more than latency. It powers the higher-quality option in the OpenAI audio endpoint and is exposed in tools like ChatGPT's Read Aloud feature on premium tiers.

Besøk OpenAI

Arkitektur

Proprietary Transformer text-to-speech with neural codec (high-fidelity variant)

OpenAI TTS-1 HD is the high-fidelity variant of the TTS-1 family. It uses the same architectural family (Transformer-based neural-codec language-model TTS) and the same six voices (alloy, echo, fable, onyx, nova, shimmer) as TTS-1, but with a larger model and additional fine-tuning on long-form narration. The result is more natural prosody, clearer diction and better handling of long sentences, punctuation and emotional pacing, at roughly 2x the price ($0.030 per 1,000 characters) and noticeably higher latency. Output is 24 kHz in six formats (MP3, Opus, AAC, FLAC, WAV, PCM). Text input is capped at 4,096 characters per request, which is recommended to be split into paragraph chunks for very long narration. The model targets offline production: audiobooks, podcasts, training videos, accessibility narration. It does not support voice cloning.

Parametere: Undisclosed (larger than TTS-1)
Kontekst: 4 096 tokens

Evner

High-fidelity narration with natural prosody and emotional pacing
Six recorded voices: alloy, echo, fable, onyx, nova, shimmer
Multilingual: 50+ languages including English, German, Spanish, French, Italian, Japanese, Mandarin
Six output formats including FLAC for lossless production
Long-sentence handling tuned for audiobook-style narration
Drop-in API-compatible with TTS-1 (just change the model name)
Best for: audiobooks, podcasts, training content, voiceover, accessibility narration

Trening og lisens

Not disclosed. OpenAI states voices were recorded with paid professional actors; training corpus is a curated mix of recorded speech and licensed text-audio pairs.

Lisens: Proprietary commercial API. Generated audio may be used commercially under the OpenAI Usage Policy; the six stock voices cannot be impersonated outside the API.

Sikkerhetstesting: Same Preparedness red-team coverage as TTS-1; voice cloning is intentionally not exposed; outputs may carry provenance metadata.

Kjente begrensninger

No voice cloning
2x price of TTS-1 ($0.030 vs $0.015 per 1k chars)
Higher latency unsuitable for real-time voice agents
Hard cap of 4,096 characters per request
Limited explicit prosody / emotion controls

Forskningsartikler

Priser

Priser i amerikanske dollar. Bruk belastes fra forhåndsbetalt kreditt.

1.000 tegn	0,036 USD per 1.000 tegn

1 kreditt = 0,01 USD

Kostnadsberegner

Prisberegner

Tegn per kjøring

/ kjøring

Kjøringer

Totalt

3,60 USD

360 credits

Per kjøring

0,036 USD · 3,6 credits

Fast pris per kjøring, kjent før kjøringen starter.

API

Ring OpenAI TTS-1 HD med din Railwail API-nøkkel. Bruk denne modell-IDen i forespørselen:

openai-tts-1-hdAPI-dokumentasjon Få en API-nøkkel

curl https://railwail.com/api/v1/audio/speech \
  -H "Authorization: Bearer $RAILWAIL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai-tts-1-hd",
    "input": "Hello from railwail. This sentence was spoken by a text-to-speech model.",
    "voice": "alloy"
  }' \
  --output speech.mp3

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["RAILWAIL_API_KEY"],
    base_url="https://railwail.com/api/v1",
)

with client.audio.speech.with_streaming_response.create(
    model="openai-tts-1-hd",
    input="Hello from railwail. This sentence was spoken by a text-to-speech model.",
    voice="alloy",
) as response:
    response.stream_to_file("speech.mp3")

import fs from "node:fs";
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.RAILWAIL_API_KEY,
  baseURL: "https://railwail.com/api/v1",
});

const speech = await client.audio.speech.create({
  model: "openai-tts-1-hd",
  input: "Hello from railwail. This sentence was spoken by a text-to-speech model.",
  voice: "alloy"
});

fs.writeFileSync("speech.mp3", Buffer.from(await speech.arrayBuffer()));

Sett nøkkelen din som RAILWAIL_API_KEYOpprett API-nøkkel

Spesifikasjoner

Modell-ID: openai-tts-1-hd
Utvikler: OpenAI
Kategori: Tekst-til-tale
Inndata: Tekst
Utdata: Lyd
Utdataformater: MP3, OPUS, AAC, FLAC
Fakturering: Fastpris, kjent før kjøring
Modellstørrelse: Undisclosed (larger than TTS-1)
Lisens: Proprietary commercial API. Generated audio may be used commercially under the OpenAI Usage Policy; the six stock voices cannot be impersonated outside the API.
Katalogoppføring oppdatert: 23. september 2026

Inndataparametere

Inndataer og innstillinger fra modellens inndataskjema. Eksemplet i API-delen viser hvilke av dem APIen godtar.

ParameterTypeStandardTillatte verdier

textobligatorisk
Type: Tekst
Standard: –
Tillatte verdier: –
voice
Type: Valg
Standard: –
Tillatte verdier: alloy, echo, fable, onyx, nova eller shimmer
response_format
Type: Valg
Standard: –
Tillatte verdier: mp3, opus, aac eller flac

Merkelapper

high-quality

Eksempelprompts

Eksempler fra Railwail-katalogen. De ble ikke generert live på denne siden.

Audiobook Passage
The old lighthouse keeper climbed the spiral stairs for the last time. Forty years of storms, shipwrecks, and solitary nights had carved deep lines into his face. But tonight, as the automated beacon flickered to life without him, he felt not relief but an aching emptiness—the sea no longer needed his watchful eyes.
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Brukstilfeller

Hva det brukes til

Audiobook production
High-quality podcast narration
Training and e-learning voiceover
Marketing videos and explainer content
Accessibility narration for premium products

Relaterte veiledninger

AI Voice & Text-to-Speech Models

Alle modeller i Tekst-til-tale

Ofte stilte spørsmål

Hva er OpenAI TTS-1 HD?

OpenAI TTS-1 HD er en modell fra OpenAI i kategorien Tekst-til-tale. På Railwail kan du kalle den med en API-nøkkel gjennom Railwail API.

Hvor mye koster OpenAI TTS-1 HD på Railwail?

På Railwail koster OpenAI TTS-1 HD 0,036 USD per 1.000 tegn. Prisen er kjent før kjøringen starter. Bruk betales fra forhåndskjøpte kreditter; 1 kreditt tilsvarer 0,01 USD.

Hvilke innstillinger støtter OpenAI TTS-1 HD?

I henhold til inndataskjemaet kjenner OpenAI TTS-1 HD disse parametrene: text, voice (alloy, echo, fable, onyx, nova eller shimmer) og response_format (mp3, opus, aac eller flac).

Hvor rask er OpenAI TTS-1 HD?

Det finnes ennå ikke nok målte kjøringer av OpenAI TTS-1 HD på Railwail til å angi en kjøretid. Det avhenger av inndataene, innstillingene og belastningen hos leverandøren.

Er OpenAI TTS-1 HD bedre enn AudioLDM 2?

Det avhenger av oppgaven. OpenAI TTS-1 HD (OpenAI) og AudioLDM 2 (Haohe Liu) er begge modeller i kategorien Tekst-til-tale. Sammenligningssiden viser prisene og spesifikasjonene deres side ved side.

Sammenlign OpenAI TTS-1 HD og AudioLDM 2

Hvordan bruker jeg OpenAI TTS-1 HD gjennom API-en?

Opprett en Railwail API-nøkkel og send forespørselen din med modell-ID-en openai-tts-1-hd. Kodeeksempler for curl, Python og JavaScript finnes i API-delen av denne siden.

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17 % billigere per enhet
Sammenlign OpenAI TTS-1 HD og Chatterbox
OpenAI TTS-1OpenAI
OpenAI's text-to-speech model. Six built-in voices with natural intonation.
0,018 USD/1.000 tegn
50 % billigere per enhet
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Qwen3 TTSAlibaba (Qwen)
A unified Text-to-Speech demo featuring three powerful modes: Voice, Clone and Design
0,024 USD/1.000 tegn
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Bruk OpenAI TTS-1 HD via APIen

Én API-nøkkel for alle modeller på Railwail. Bruk belastes fra forhåndsbetalt kreditt, 1 kreditt = 0,01 USD.

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