YepAPI
AI Models

Eleven v4 Turbo

The low-latency version of Eleven v4 — expressive delivery and audio tags, 90+ languages.

POST/v1/media/queue
$0.0844/1K chars

Overview

Eleven v4 Turbo is a low-latency text-to-speech model from ElevenLabs. It keeps Eleven v4's expressive delivery and inline audio tags while being tuned for faster generation, and supports more than 90 languages.

PropertyValue
Model IDelevenlabs/eleven-v4-turbo
Aliaseleven-v4-turbo
Upstream Modelelevenlabs/eleven-v4-turbo
CategoryText to Speech
Languages90+ languages
Outputmp3 (default) or pcm
Pricing$0.0844 per 1,000 characters

Usage

All media models use the async job queue. Submit a job, then poll for the result.

Step 1: Submit Job

const res = await fetch('https://api.yepapi.com/v1/media/queue', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    model: 'elevenlabs/eleven-v4-turbo',
    prompt: 'Your text to speak goes here.',
    options: { voice: 'sarah' },
  }),
});
const { data } = await res.json();
// data.jobId — use this to poll for results
curl -X POST https://api.yepapi.com/v1/media/queue \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "elevenlabs/eleven-v4-turbo", "prompt": "Your text to speak goes here."}'

Step 2: Poll for Result

const status = await fetch(`https://api.yepapi.com/v1/media/status/${data.jobId}`, {
  headers: { 'x-api-key': 'YOUR_API_KEY' },
});
const { data: job } = await status.json();
// job.status — "pending" | "processing" | "completed" | "failed"
// job.result.audio — { mimeType, base64 } when completed
curl https://api.yepapi.com/v1/media/status/JOB_ID \
  -H "x-api-key: YOUR_API_KEY"

Write the audio to a file:

import { writeFileSync } from 'node:fs';

writeFileSync('speech.mp3', Buffer.from(job.result.audio.base64, 'base64'));

Request Body

ParameterTypeRequiredDescriptionDefault
modelstringYeselevenlabs/eleven-v4-turbo—
promptstringYesThe text to speak (max 50,000 bytes)—
options.voicestringNoVoice identifiersarah
options.outputFormatstringNomp3 (default) or pcmmp3
options.speednumberNoPlayback speed multiplier. Honoured only by models that support it1.0

Voices

sarah is used when options.voice is omitted. 21 voices available (10 of 21 shown):

  • sarah
  • george
  • adam
  • alice
  • bella
  • bill
  • brian
  • callum
  • charlie
  • chris

Features

  • Low-latency version of Eleven v4
  • Expressive delivery with inline audio tags
  • 90+ languages
  • Half the per-character price of Eleven v4

Billing

Speech is billed on the length of the input text, in UTF-8 bytes — for English text one byte is one character. The cost is known before synthesis starts, so the balance check at submit time quotes the exact final charge. Jobs have a $0.01 minimum.

Under the Hood

Powered by OpenRouter's unified speech API.

On this page