Eleven v4 Turbo API

elevenlabs/eleven_v4_turbo
ElevenLabs v4 Turbo is the low-latency variant of Eleven v4: the same expressive voices and audio tags in 90+ languages, tuned for real-time use.
Output
Released
Sep 28, 2026

Overview

What Is Eleven v4 Turbo API?

ElevenLabs v4 Turbo is the low-latency variant of Eleven v4: the same expressive voices and audio tags in 90+ languages, tuned for real-time use.

Technical Reference

DeveloperElevenLabs
Model IDelevenlabs/eleven_v4_turbo
ModalitiesText → Audio
Languages90+
Released28 September 2026
EndpointPOST /v1/tts

What Eleven v4 Turbo Brings to the Table

Built for real time
The low-latency variant of v4, for agents and live conversation where the wait before audio starts is what the listener notices.

Same voices and tags
Expressive delivery and inline audio tags carry over from v4, in the same 90+ languages.

Half the price of v4
$52 against $104 per 1M characters, which changes the economics of speech on every turn of a dialogue.

API Pricing

  • Input: $52 / 1M characters

Where Eleven v4 Turbo Makes the Most Sense

Voice agents
Support lines and in-app assistants that answer immediately.

Interactive characters
Games and companions where speech is generated turn by turn.

Sources: https://elevenlabs.io/docs/models · https://elevenlabs.io/pricing/api

Uptime and performance

  • Uptime (24h): 100%
  • Uptime (7d): 100%
  • Availability (24h): 99.0%
  • Error rate (24h): 1.0%
  • End-to-end latency (24h median): 4.3s
  • Time to first token (24h median): 269ms

Measured on the AI/ML API gateway across live traffic. Figures are medians unless stated. Last updated 2026-10-12.

Use cases

  • Voice agents: phone and in-app assistants that must answer without a noticeable pause.
  • Live conversation: interactive characters and real-time companions.
  • Streaming narration: audio generated as the text arrives rather than after it is complete.
  • High-volume pipelines: half the price of Eleven v4, which matters when every session produces speech.

How to use Eleven v4 Turbo API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to elevenlabs/eleven_v4_turbo.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/tts",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "elevenlabs/eleven_v4_turbo",
      "text": "Hello from AI/ML API",
      "voice": "Rachel"
    },
)
print(r.json()["audio"])  # URL to the generated audio
const r = await fetch("https://api.aimlapi.com/v1/tts", {
  method: "POST",
  headers: {
    Authorization: "Bearer " + process.env.AIMLAPI_KEY,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "elevenlabs/eleven_v4_turbo",
    "text": "Hello from AI/ML API",
    "voice": "Rachel"
  }),
});
console.log((await r.json()).audio);
curl -X POST https://api.aimlapi.com/v1/tts \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"elevenlabs/eleven_v4_turbo","text":"Hello from AI/ML API","voice":"Rachel"}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

Eleven v4 Turbo API Pricing

TypePrice
Input
$40 / 1M characters
Output

Billed per character of input text.

Eleven v4 Turbo Benchmarks

BenchmarkScoreWhat it measuresSourceRetrieved
TTS Arena
1334
Human preference Elo from blind pairwise listening comparisons of speech samples, measured independently by Artificial AnalysisSourceOctober 6, 2026

Eleven v4 Turbo vs other models

ModelInputOutputContextBest for
$40 / 1M characters
Speech synthesis
$60 / 1M characters
Speech synthesis
$100 / 1M characters
Speech synthesis

Frequently asked questions

Eleven v4 Turbo is ElevenLabs' text-to-speech model for real-time use, described by the vendor as its most emotive real-time speech synthesis model. It is intended for agents and live conversation.

$14.3 per 1M characters through AI/ML API — half the price of Eleven v4. Speech models are billed by characters of input text.

Text in, audio out. You pass the text and a voice, and the response carries a URL to the generated audio.

Real-time speech: voice agents, live assistants, and anything where the wait before audio starts matters more than the last increment of quality.

The text-to-speech endpoint, POST /v1/tts, with model set to elevenlabs/eleven_v4_turbo.

Start building with Eleven v4 Turbo

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1000+ models, one API.