OpenAI TTS-1

Name: OpenAI TTS-1
Brand: OpenAI
SKU: openai-tts-1
Price: 0.018 USD
Availability: InStock

Sprogudtale (TTS)Tilgængelig

af OpenAIopenai-tts-1

OpenAI's text-to-speech model. Six built-in voices with natural intonation.

Prøv det Få API-nøgle Sammenlign

Pris: 0,018 US$/1.000 tegn
Input → output: Tekst → Lyd
Udvikler: OpenAI
Opdateret: 23. september 2026

Playground

Prøv OpenAI TTS-1

Input & resultat

0,018 US$/1.000 tegn

Tekst

Stemme(valgfrit)

Avancerede indstillinger (1)

Format(valgfrit)

⌘/Ctrl + Enter

Resultat

Den genererede tale vises her.

Denne kørsel

0,0001 US$ · 0,01 credits

Ny her?

10 gratis credits (0,10 US$) når du tilmelder dig med Google

Kan bruges 24 timer efter tilmelding, op til 5 kørsler pr. dag og højst 2 credits pr. kørsel. Andre login-metoder starter uden credits. Nok til 1.000 kørsler af denne model.

Om OpenAI TTS-1

Kort sagtFra 23. september 2026

OpenAI TTS-1 er en model af OpenAI i kategorien Sprogudtale (TTS). På Railwail koster OpenAI TTS-1 0,018 US$ pr. 1.000 tegn.

Baggrund

Om OpenAI

Grundlagt 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. It restructured into the capped-profit OpenAI LP in 2019 and has since received over $13B from Microsoft plus billions more from Thrive Capital, Sequoia, Khosla and SoftBank, at a 2024 valuation north of $157B and a planned 2025 round reportedly at $500B. The audio research line at OpenAI includes Jukebox (2020), Whisper (2022) and the TTS-1 family released in November 2023 alongside the ChatGPT voice feature. TTS-1 powers ChatGPT Voice Mode, the OpenAI API audio endpoint and the Realtime API used in voice agents.

Besøg OpenAI

Arkitektur

Proprietary Transformer text-to-speech with neural codec

OpenAI TTS-1 is the standard-quality variant of OpenAI's text-to-speech model family, optimised for real-time streaming inside ChatGPT Voice and the Realtime API. It is a Transformer-based model that predicts neural-codec audio tokens conditioned on text and a fixed set of stock voices (alloy, echo, fable, onyx, nova, shimmer) that OpenAI recorded with professional voice talent. There is no voice cloning. The model supports six output formats (MP3, Opus, AAC, FLAC, WAV, PCM) and outputs at 24 kHz. TTS-1 is tuned for low latency and starts streaming audio within a few hundred milliseconds, making it suitable for live conversational agents, while the HD sibling trades latency for fidelity. Text input is capped at 4,096 characters per request. OpenAI has not published a technical paper but the system architecturally resembles published neural-codec TTS such as VALL-E.

Parametre: Undisclosed
Kontekst: 4.096 tokens

Funktioner

Real-time streaming TTS with sub-second first-byte latency
Six recorded voices: alloy, echo, fable, onyx, nova, shimmer
Multilingual: 50+ languages including English, German, Spanish, French, Italian, Japanese, Mandarin
Six output formats including streaming PCM for low latency
Powers ChatGPT Voice and the OpenAI Realtime API
Inexpensive at $0.015 per 1,000 characters (vs. $0.03 for HD)
Best for: voice agents, IVR, interactive narration, accessibility

Træning og licens

Not disclosed. OpenAI states voices were recorded with paid professional voice actors and the model was trained on a mixture of recorded speech and licensed text-audio pairs.

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

Sikkerhedstests: OpenAI's Preparedness team red-teamed Voice Mode; outputs include watermark provenance metadata in the Realtime API where supported. Voice cloning is intentionally not exposed.

Kendte begrænsninger

No custom voice cloning
Limited prosody / emotion control
Quality below TTS-1 HD on slow, emotional narration
Hard cap of 4,096 characters per request
Closed weights, hosted only

Forskningsartikler

Priser

Priser i US-dollar. Forbrug debiteres fra forudbetalte credits.

1.000 tegn	0,018 US$ pr. 1.000 tegn

1 kredit = 0,01 US$

Omkostningsberegner

Prisberegner

Tegn pr. kørsel

/ kørsel

Kørsler

I alt

1,80 US$

180 credits

Pr. kørsel

0,018 US$ · 1,8 credits

Fast pris pr. kørsel, kendt før kørslen starter.

API

Kald OpenAI TTS-1 med din Railwail API-nøgle. Brug dette model-ID i anmodningen:

openai-tts-1API-dokumentation Få en API-nøgle

curl https://railwail.com/api/v1/audio/speech \
  -H "Authorization: Bearer $RAILWAIL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai-tts-1",
    "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",
    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",
  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()));

Indstil din nøgle som RAILWAIL_API_KEYOpret API-nøgle

Specifikationer

Model-ID: openai-tts-1
Udvikler: OpenAI
Kategori: Sprogudtale (TTS)
Input: Tekst
Output: Lyd
Outputformater: MP3, OPUS, AAC, FLAC
Fakturering: Fastpris, kendt før kørslen
Modelstørrelse: Undisclosed
Licens: Proprietary commercial API. Generated audio may be used commercially under the OpenAI Usage Policy; the six stock voices cannot be impersonated outside the API.
Katalogelement opdateret: 23. september 2026

Inputparametre

Inputs og indstillinger fra modellens inputskema. Eksemplet i API-afsnittet viser, hvilke af dem API'en accepterer.

ParameterTypeStandardTilladte værdier

textpåkrævet
Type: Tekst
Standard: –
Tilladte værdier: –
voice
Type: Valg
Standard: –
Tilladte værdier: alloy, echo, fable, onyx, nova eller shimmer
response_format
Type: Valg
Standard: –
Tilladte værdier: mp3, opus, aac eller flac

Eksempelprompts

Eksempler fra Railwail-kataloget. De blev ikke genereret live på denne side.

Notification Voice
Your order has been confirmed and is being prepared. Estimated delivery time is thirty-five minutes. You'll receive a notification when your driver is on the way.
Tutorial Guide
Step one: open your terminal and navigate to the project directory. Step two: run npm install to download all dependencies. Step three: create a dot env file and add your API keys. Finally, run npm run dev to start the development server.

Anvendelsestilfælde

Hvad det bruges til

Real-time voice agents
ChatGPT Voice and conversational tutors
IVR and phone bot replies
Accessibility narration for web and mobile
Notification and alert audio

Relaterede vejledninger

AI Voice & Text-to-Speech Models

Alle modeller i Sprogudtale (TTS)

Ofte stillede spørgsmål

Hvad er OpenAI TTS-1?

OpenAI TTS-1 er en model fra OpenAI i kategorien Sprogudtale (TTS). På Railwail kan du kalde den med en API-nøgle via Railwail API.

Hvad koster OpenAI TTS-1 på Railwail?

På Railwail koster OpenAI TTS-1 0,018 US$ pr. 1.000 tegn. Prisen kendes før kørslen starter. Forbrug betales fra forudbetalte credits; 1 credit svarer til 0,01 US$.

Hvilke indstillinger understøtter OpenAI TTS-1?

Ifølge dens inputskema kender OpenAI TTS-1 disse parametre: text, voice (alloy, echo, fable, onyx, nova eller shimmer) og response_format (mp3, opus, aac eller flac).

Hvor hurtig er OpenAI TTS-1?

Der er endnu ikke nok målte kørsler af OpenAI TTS-1 på Railwail til at angive en udførelsestid. Det afhænger af inputtet, indstillingerne og belastningen hos provideren.

Er OpenAI TTS-1 bedre end AudioLDM 2?

Det afhænger af opgaven. OpenAI TTS-1 (OpenAI) og AudioLDM 2 (Haohe Liu) er begge modeller i kategorien Sprogudtale (TTS). Sammenligningssiden viser deres priser og specifikationer side om side.

Sammenlign OpenAI TTS-1 og AudioLDM 2

Hvordan bruger jeg OpenAI TTS-1 via API'en?

Opret en Railwail API-nøgle og send din anmodning med model-ID'en openai-tts-1. Kodeeksempler til curl, Python og JavaScript findes i API-sektionen på denne side.

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Brug OpenAI TTS-1 via API'en

En API-nøgle til alle modeller på Railwail. Forbrug debiteres fra forudbetalte credits, 1 credit = 0,01 US$.

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