OpenAI TTS-1 HD

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

Konverzia textu na rečDostupné

od OpenAIopenai-tts-1-hd

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

Vyskúšať Získať API kľúč Porovnať

Cena: 0,036 USD/1 000 znakov
Vstup → výstup: Text → Audio
Vývojár: OpenAI
Aktualizované: 23. septembra 2026

Playground

Vyskúšajte OpenAI TTS-1 HD

Vstup a výstup

0,036 USD/1 000 znakov

Text

Hlas(voliteľné)

Pokročilé nastavenia (1)

Formát(voliteľné)

⌘/Ctrl + Enter

Výsledok

Generovaná reč sa objaví tu.

Tento beh

0,0001 USD · 0,01 credits

Nový tu?

10 bezplatných credits (0,10 USD) pri registrácii cez Google

Použiteľné 24 hodín po registrácii, až 5 behov za deň a maximálne 2 credits za beh. Ostatné spôsoby prihlásenia sa spúšťajú bez credits. Stačí na 1 000 spustení tohto modelu.

O OpenAI TTS-1 HD

StručneK 23. septembra 2026

OpenAI TTS-1 HD je model od OpenAI v kategórii Konverzia textu na reč. Na Railwail stojí OpenAI TTS-1 HD 0,036 USD za 1 000 znakov.

Pozadie

O OpenAI

Založené 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.

Navštíviť OpenAI

Architektúra

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.

Parametre: Undisclosed (larger than TTS-1)
Kontext: 4 096 tokenov

Schopnosti

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

Tréning a licencia

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.

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

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

Známe obmedzenia

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

Výskumné články

Ceny

Ceny v USD. Použitie sa účtuje z predplateného kreditu.

1 000 znakov	0,036 USD za 1 000 znakov

1 kredit = 0,01 USD

Kalkulačka nákladov

Kalkulačka cien

Znaky na spustenie

/ spustenie

Spustenia

Celkom

3,60 USD

360 kreditov

Na spustenie

0,036 USD · 3,6 kreditov

Pevná cena za spustenie, známa pred spustením.

API

Zavolajte OpenAI TTS-1 HD s vaším API kľúčom Railwail. V požiadavke použite toto ID modelu:

openai-tts-1-hdDokumentácia API Získať API kľúč

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()));

Nastavte svoj kľúč ako RAILWAIL_API_KEYVytvoriť API kľúč

Špecifikácie

ID modelu: openai-tts-1-hd
Vývojár: OpenAI
Kategória: Konverzia textu na reč
Vstup: Text
Výstup: Audio
Formáty výstupu: MP3, OPUS, AAC, FLAC
Fakturácia: Pevná cena, známa pred spustením
Veľkosť modelu: Undisclosed (larger than TTS-1)
Licencia: Proprietary commercial API. Generated audio may be used commercially under the OpenAI Usage Policy; the six stock voices cannot be impersonated outside the API.
Katalógová položka aktualizovaná: 23. septembra 2026

Vstupné parametre

Vstupy a nastavenia zo vstupnej schémy modelu. Príklad v sekcii API ukazuje, ktoré z nich API akceptuje.

ParameterTypPredvolenéPovolené hodnoty

textpovinné
Typ: Text
Predvolené: –
Povolené hodnoty: –
voice
Typ: Výber
Predvolené: –
Povolené hodnoty: alloy, echo, fable, onyx, nova alebo shimmer
response_format
Typ: Výber
Predvolené: –
Povolené hodnoty: mp3, opus, aac alebo flac

Značky

high-quality

Príklady promptov

Príklady z katalógu Railwail. Neboli vygenerované živě na tejto stránke.

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.
Product Demo
Introducing AuraSync, the smart home hub that learns your routines. It dims the lights when you start a movie, adjusts the thermostat when you fall asleep, and brews your coffee exactly six minutes before your alarm. Your home, finally as intelligent as you are.

Prípady použitia

Na čo sa používa

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

Súvisiace príručky

AI Voice & Text-to-Speech Models

Všetky modely v Konverzia textu na reč

Často kladené otázky

Čo je OpenAI TTS-1 HD?

OpenAI TTS-1 HD je model od OpenAI v kategórii Konverzia textu na reč. Na Railwail ho môžete volať pomocou API kľúča cez Railwail API.

Koľko stojí OpenAI TTS-1 HD na Railwail?

Na Railwail stojí OpenAI TTS-1 HD 0,036 USD za 1 000 znakov. Cena je známa pred spustením. Použitie sa platí z predplateného kreditu; 1 kredit sa rovná 0,01 USD.

Ktoré nastavenia podporuje OpenAI TTS-1 HD?

Podľa svojej vstupnej schémy OpenAI TTS-1 HD pozná tieto parametre: text, voice (alloy, echo, fable, onyx, nova alebo shimmer) a response_format (mp3, opus, aac alebo flac).

Ako rýchly je OpenAI TTS-1 HD?

Pre OpenAI TTS-1 HD je na Railwail zatiaľ príliš málo meraných spustení na určenie doby spustenia. Závisí to od vstupu, nastavení a zaťaženia u poskytovateľa.

Je OpenAI TTS-1 HD lepší ako AudioLDM 2?

Závisí to od úlohy. OpenAI TTS-1 HD (OpenAI) a AudioLDM 2 (Haohe Liu) sú oba modely v kategórii Konverzia textu na reč. Stránka porovnania zobrazuje ich ceny a špecifikácie vedľa seba.

Porovnať OpenAI TTS-1 HD a AudioLDM 2

Ako používam OpenAI TTS-1 HD cez API?

Vytvorte Railwail API kľúč a pošlite svoju požiadavku s ID modelu openai-tts-1-hd. Príklady kódu pre curl, Python a JavaScript sú v časti API na tejto stránke.

Porovnateľné modely

Všetky v tejto kategórii

ChatterboxResemble AI
Resemble AI's open Chatterbox TTS. Zero-shot voice cloning from a short audio prompt with an exaggeration control for emotion intensity, plus CFG weight to balance pacing and fidelity.
0,030 USD/1 000 znakov
17 % lacnejšie na jednotku
Porovnať OpenAI TTS-1 HD a Chatterbox
OpenAI TTS-1OpenAI
OpenAI's text-to-speech model. Six built-in voices with natural intonation.
0,018 USD/1 000 znakov
50 % lacnejšie na jednotku
Porovnať OpenAI TTS-1 HD a OpenAI TTS-1
Qwen3 TTSAlibaba (Qwen)
A unified Text-to-Speech demo featuring three powerful modes: Voice, Clone and Design
0,024 USD/1 000 znakov
33 % lacnejšie na jednotku
Porovnať OpenAI TTS-1 HD a Qwen3 TTS

Použiť OpenAI TTS-1 HD cez API

Jeden API kľúč pre všetky modely na Railwail. Použitie sa účtuje z predplateného kreditu, 1 kredit = 0,01 USD.

Získať API kľúč Prehliadnuť všetky modely