OpenAI TTS-1 HD

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

Pretvarjanje besedila v govorRazpoložljivo

od OpenAIopenai-tts-1-hd

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

Preizkusi Pridobi API ključ Primerjaj

Cena: 0,036 $/1.000 znakov
Vhod → Izhod: Besedilo → Avdio
Razvijalec: OpenAI
Posodobljeno: 23. september 2026

Igrišče

Preizkusi OpenAI TTS-1 HD

Vnos in rezultat

0,036 $/1.000 znakov

Besedilo

Glas(izbirno)

Napredne nastavitve (1)

Oblika(izbirno)

⌘/Ctrl + Enter

Rezultat

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Ta zagon

0,0001 $ · 0,01 kreditov

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O OpenAI TTS-1 HD

PovzetekOd 23. september 2026

OpenAI TTS-1 HD je model razvijalca OpenAI iz kategorije Pretvarjanje besedila v govor. Na Railwail stane OpenAI TTS-1 HD 0,036 $ na 1.000 znakov.

Ozadje

O OpenAI

Ustanovljeno 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.

Obiščite OpenAI

Arhitektura

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.

Parametri: Undisclosed (larger than TTS-1)
Kontekst: 4096 žetonov

Zmožnosti

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

Usposabljanje in licenca

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.

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

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

Znane omejitve

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

Raziskovalni članki

Cene

Cene v ameriških dolarjih. Uporaba se obračuna iz vnaprej plačanih kreditov.

1.000 znakov	0,036 $ na 1.000 znakov

1 kredit = 0,01 $

Kalkulator stroškov

Kalkulator cen

Znaki na zagon

/ zagon

Zagoni

Skupaj

3,60 $

360 kreditov

Na zagon

0,036 $ · 3,6 kreditov

Fiksna cena na zagon, znana pred začetkom.

API

Pokličite OpenAI TTS-1 HD s svojim Railwail API ključem. V zahtevku uporabite to ID modela:

openai-tts-1-hdDokumentacija API Pridobite API ključ

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()));

Nastavite ključ kot RAILWAIL_API_KEYUstvari API ključ

Specifikacije

ID modela: openai-tts-1-hd
Razvijalec: OpenAI
Kategorija: Pretvarjanje besedila v govor
Vhod: Besedilo
Izhod: Avdio
Oblike izhoda: MP3, OPUS, AAC, FLAC
Obračunavanje: Fiksna cena, znana pred zagonom
Velikost modela: Undisclosed (larger than TTS-1)
Licenca: Proprietary commercial API. Generated audio may be used commercially under the OpenAI Usage Policy; the six stock voices cannot be impersonated outside the API.
Kataložni vnos posodobljen: 23. september 2026

Vhodne parametre

Vhodi in nastavitve iz vhodne sheme modela. Primer v razdelku API prikazuje, katere od njih API sprejema.

ParameterTipPrivzetoDovoljene vrednosti

textObvezno
Tip: Besedilo
Privzeto: –
Dovoljene vrednosti: –
voice
Tip: Izbira
Privzeto: –
Dovoljene vrednosti: alloy, echo, fable, onyx, nova ali shimmer
response_format
Tip: Izbira
Privzeto: –
Dovoljene vrednosti: mp3, opus, aac ali flac

Oznake

high-quality

Primeri pozivov

Primeri iz kataloga Railwail. Niso bili generirani v živo na tej strani.

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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Primeri uporabe

Kaj se uporablja za

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

Povezani vodniki

AI Voice & Text-to-Speech Models

Vsi modeli v Pretvarjanje besedila v govor

Pogosta vprašanja

Kaj je OpenAI TTS-1 HD?

OpenAI TTS-1 HD je model podjetja OpenAI iz kategorije Pretvarjanje besedila v govor. Na Railwailu ga lahko pokličete z ključem API prek Railwailovega API-ja.

Koliko stane OpenAI TTS-1 HD na Railwailu?

Na Railwail stane OpenAI TTS-1 HD 0,036 $ na 1.000 znakov. Cena je znana pred začetkom izvajanja. Uporaba se plača s predplačanimi krediti; 1 kredit je enak 0,01 $.

Katere nastavitve podpira OpenAI TTS-1 HD?

Glede na shemo vnosa OpenAI TTS-1 HD pozna te parametre: text, voice (alloy, echo, fable, onyx, nova ali shimmer) in response_format (mp3, opus, aac ali flac).

Kako hiter je OpenAI TTS-1 HD?

Za OpenAI TTS-1 HD je na Railwailu še premalo izmerjenih zagonov, da bi navedli čas izvajanja. Odvisno je od vnosa, nastavitev in obremenitve pri ponudniku.

Je OpenAI TTS-1 HD boljši od AudioLDM 2?

To je odvisno od naloge. OpenAI TTS-1 HD (OpenAI) in AudioLDM 2 (Haohe Liu) sta oba modela iz kategorije Pretvarjanje besedila v govor. Stran za primerjavo prikazuje njune cene in specifikacije drug ob drugem.

Primerjaj OpenAI TTS-1 HD in AudioLDM 2

Kako uporabljam OpenAI TTS-1 HD prek API-ja?

Ustvarite ključ Railwailovega API-ja in pošljite zahtevo z ID-jem modela openai-tts-1-hd. Primeri kode za curl, Python in JavaScript so v razdelku API na tej strani.

Primerljivi modeli

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Primerjaj OpenAI TTS-1 HD in Chatterbox
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Primerjaj OpenAI TTS-1 HD in OpenAI TTS-1
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Primerjaj OpenAI TTS-1 HD in Qwen3 TTS

Uporabite OpenAI TTS-1 HD prek API

En API ključ za vsak model na Railwail. Uporaba se obračuna iz vnaprej plačanih kreditov, 1 kredit = 0,01 $.

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