OpenAI TTS-1 HD

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

Pretvaranje teksta u govorDostupno

od OpenAIopenai-tts-1-hd

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

Isprobaj Preuzmi API ključ Usporedi

Cijena: 0,036 US$/1.000 znakova
Ulaz → izlaz: Tekst → Audio
Razvojni inženjer: OpenAI
Ažurirano: 23. septembar 2026.

Playground

Isprobaj OpenAI TTS-1 HD

Unos i rezultat

0,036 US$/1.000 znakova

Tekst

Glas(opcionalno)

Napredne postavke (1)

Format(opcionalno)

⌘/Ctrl + Enter

Rezultat

Generirani govor se pojavljuje ovdje.

Ovaj pokus

0,0001 US$ · 0,01 kredita

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O OpenAI TTS-1 HD

UkratkoStanje: 23. septembar 2026.

OpenAI TTS-1 HD je model od OpenAI iz kategorije Pretvaranje teksta u govor. Na Railwailu, OpenAI TTS-1 HD košta 0,036 US$ po 1.000 znakova.

Pozadina

O OpenAI

Osnovano 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.

Posjetite 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: 4.096 tokena

Mogućnosti

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

Obuka i 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.

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

Poznata ograničenja

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

Znanstveni članci

Cijene

Cijene u USD-u. Korištenje se naplaćuje iz unaprijed plaćenih kredita.

1.000 znakova	0,036 US$ po 1.000 znakova

1 kredit = 0,01 US$

Kalkulator troškova

Kalkulator cijena

Znakovi po pokretanju

/ pokretanje

Pokretanja

Ukupno

3,60 US$

360 kredita

Po pokretanju

0,036 US$ · 3,6 kredita

Fiksna cijena po pokretanju, poznata prije početka.

API

Pozovi OpenAI TTS-1 HD sa svojim Railwail API ključem. Koristi ovaj ID modela u zahtjevu:

openai-tts-1-hdPogledaj API dokumentaciju Dobij 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()));

Postavite ključ kao RAILWAIL_API_KEYKreiraj API ključ

Specifikacije

ID modela: openai-tts-1-hd
Razvojni inženjer: OpenAI
Kategorija: Pretvaranje teksta u govor
Ulaz: Tekst
Izlaz: Audio
Formati izlaza: MP3, OPUS, AAC, FLAC
Naplata: Fiksna cijena, poznata prije pokretanja
Veličina 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.
Katalog ažuriran: 23. septembar 2026.

Parametri ulaza

Ulazi i postavke iz sheme ulaza modela. Primjer u odjeljku API pokazuje koje od njih API prihvaća.

ParametarTipZadanoDozvoljene vrijednosti

textobavezno
Tip: Tekst
Zadano: –
Dozvoljene vrijednosti: –
voice
Tip: Izbor
Zadano: –
Dozvoljene vrijednosti: alloy, echo, fable, onyx, nova ili shimmer
response_format
Tip: Izbor
Zadano: –
Dozvoljene vrijednosti: mp3, opus, aac ili flac

Oznake

high-quality

Primjer promptova

Primjeri iz Railwail kataloga. Nisu generirani uživo na ovoj stranici.

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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Primjena

Za što se koristi

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

Povezani vodiči

AI Voice & Text-to-Speech Models

Svi modeli: Pretvaranje teksta u govor

Često postavljana pitanja

Što je OpenAI TTS-1 HD?

OpenAI TTS-1 HD je model od OpenAI iz kategorije Pretvaranje teksta u govor. Na Railwailu ga možete pozvati s API ključem kroz Railwail API.

Koliko stoji OpenAI TTS-1 HD na Railwailu?

Na Railwailu, OpenAI TTS-1 HD košta 0,036 US$ po 1.000 znakova. Cijena je poznata prije nego što se pokretanje počne. Korištenje se plaća iz unaprijed kupljenih kredita; 1 kredit jednaka je 0,01 US$.

Koje postavke podržava OpenAI TTS-1 HD?

Prema svojoj shemi unosa, OpenAI TTS-1 HD poznaje ove parametre: text, voice (alloy, echo, fable, onyx, nova ili shimmer) i response_format (mp3, opus, aac ili flac).

Koliko je brz OpenAI TTS-1 HD?

Za OpenAI TTS-1 HD na Railwailu još nema dovoljno izmjerenih pokretanja da bi se navedlo vrijeme izvršavanja. Ovisi o unošenju, postavkama i opterećenju kod pružatelja.

Je li OpenAI TTS-1 HD bolji od AudioLDM 2?

To ovisi o zadatku. OpenAI TTS-1 HD (OpenAI) i AudioLDM 2 (Haohe Liu) su oba modela iz kategorije Pretvaranje teksta u govor. Stranica za usporedbu prikazuje njihove cijene i specifikacije usporedno.

Usporedi OpenAI TTS-1 HD i AudioLDM 2

Kako koristim OpenAI TTS-1 HD kroz API?

Kreiraj Railwail API ključ i pošalji svoj zahtjev s ID-om modela openai-tts-1-hd. Primjeri koda za curl, Python i JavaScript nalaze se u odjeljku API na ovoj stranici.

Usporedivi modeli

Svi u ovoj kategoriji

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 US$/1.000 znakova
17 % jeftinije po jedinici
Usporedi OpenAI TTS-1 HD i Chatterbox
OpenAI TTS-1OpenAI
OpenAI's text-to-speech model. Six built-in voices with natural intonation.
0,018 US$/1.000 znakova
50 % jeftinije po jedinici
Usporedi OpenAI TTS-1 HD i OpenAI TTS-1
Qwen3 TTSAlibaba (Qwen)
A unified Text-to-Speech demo featuring three powerful modes: Voice, Clone and Design
0,024 US$/1.000 znakova
33 % jeftinije po jedinici
Usporedi OpenAI TTS-1 HD i Qwen3 TTS

Koristi OpenAI TTS-1 HD preko API-ja

Jedan API ključ za sve modele na Railwailu. Korištenje se naplaćuje iz unaprijed plaćenih kredita, 1 kredit = 0,01 US$.

Dobij API ključ Pogledaj sve modele