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

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
$14.3 / 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
$14.3 / 1M characters
Speech synthesis
$78 / 1M characters
Speech synthesis
$130 / 1M characters
Speech synthesis
$28.6 / 1M
$28.6 / 1M
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

Get API Key
1000+ models, one API.