[confidently] Your alarm has an opinion. So does the rain. Neither gets a vote. Lace up. Step out. Find the street before the city wakes. This is not about being the fastest person out there. It is about showing up for the person you want to become. [excited] Your next chapter starts on the starting line.
ElevenLabs Eleven v4 Turbo API
ElevenLabs Eleven v4 Turbo: expressive multilingual speech with audio tags, voice selection and delivery controls.
ElevenLabs·AudioAvailable
from$0.036/ 1K chars$0.0410% off
Model IDelevenlabs-tts-v4-turbo
text-to-speechvoicemultilingual
Input
Text
Output
Audio
Provider
3 providers
Stability
0 – 1
Voice similarity
0 – 1
Seed
0 – 4294967295
Last 7 days · not enough recent requests for stats yet.
ElevenLabs Eleven v4 Turbo pricing
Prices are per unit; requests without a provider are routed to the cheapest provider that supports your parameters.
| Option | Price (USD) |
|---|---|
| All options | $0.036 / 1K chars 1 Credits |
Try ElevenLabs Eleven v4 Turbo before you integrate
Test output quality, compare provider prices and estimate cost before writing any code.
Provider
Audio
Estimated cost
Input
prompt
0 / 5000
voice
stability
similarity_boost
language_code
seed
output_format
apply_text_normalization
Result
IdleYour generation will appear here.
Provider prices for this request
Enter a prompt to compare provider prices.
ElevenLabs Eleven v4 Turbo prompt examples
Ready-to-use prompts. Load one into the playground and tweak it.
Source
Scene
5 prompts
[excited] Hello! Welcome to Eleven v4.
Dawn run motivation
Motivation[confidently] It's raining. You're up anyway. Shoes on. Door open. Every step out here is the person you're becoming. [excited] See you at the starting line!
App onboarding prompt
ProductWelcome back! Tap the plus button to start a new project, or swipe left to see what your team has been working on.
Short social hook
Social[whispering] Okay, nobody talks about this... [excited] but this one setting doubled my battery life.
ElevenLabs Eleven v4 Turbo API reference
Endpoints, request fields and runnable examples for this model.
Base URL
https://01router.com/api/v1Quick start
Set API_KEY to your project key, then run a sample from your server. Replace example media URLs with your own public URLs.
Auto-routing chooses a provider that supports the request. Select a provider to see its input constraints and pinned request examples.
curl https://01router.com/api/v1/generations \
-H "Authorization: Bearer $API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'JSON'
{
"model": "elevenlabs-tts-v4-turbo",
"input": {
"prompt": "Welcome back. Let us get started.",
"voice": "Rachel",
"stability": 0.5,
"similarity_boost": 0.75,
"output_format": "mp3_44100_128",
"apply_text_normalization": "auto"
}
}
JSON
# Replace GENERATION_ID with the id returned above; poll until status is "succeeded" or "failed"
curl https://01router.com/api/v1/generations/GENERATION_ID -H "Authorization: Bearer $API_KEY"Endpoints
Only endpoints relevant to this model are listed. Paths below include /api/v1. Click an endpoint to read its usage.
POSTGETPOSTPOSTGET
/api/v1/generationsCreate a generation (charges credits) · API key required
/api/v1/generations/{id}Get a generation; polls the provider while running · API key required
/api/v1/generations/{id}/cancelCancel a running generation (credits refunded) · API key required
/api/v1/quotePrice a request on every provider (no charge, no key needed) · Public · no key
/api/v1/models/elevenlabs-tts-v4-turboGet one model · Public · no key
Authentication
Send your API key as a Bearer token. Requests are billed to the key owner's credits.
Authorization: Bearer YOUR_API_KEY
Content-Type: application/jsonInput
Send JSON with Content-Type: application/json. Model parameters belong inside input; model, provider and callback_url are top-level fields.
Request body
| Name | Type | Required | Description |
|---|---|---|---|
| model | string | Yes | "elevenlabs-tts-v4-turbo" |
| provider | string | No | Pin a provider; omit to auto-route to the cheapest. One of: fal | wavespeed | openrouter |
| input | object | Yes | Model parameters, see the input fields below. |
| callback_url | string | No | Optional public HTTPS webhook URL. The final task result is signed and delivered here; polling remains available. |
input · input fields
Required fields are marked explicitly. Other fields use the listed defaults when omitted.
| Name | Type | Required | Values | Default |
|---|---|---|---|---|
| prompt* | string | Yes | maxLength: 5000 | — |
| voice | string | No | — | Rachel |
| stability | number | No | min: 0 · max: 1 | 0.5 |
| similarity_boost | number | No | min: 0 · max: 1 | 0.75 |
| language_code ISO 639-1, e.g. en or zh | string | No | — | — |
| seed | integer | No | min: 0 · max: 4294967295 | — |
| output_format | string | No | mp3_22050_32 | mp3_44100_32 | mp3_44100_64 | mp3_44100_96 | mp3_44100_128 | mp3_44100_192 | pcm_8000 | pcm_16000 | pcm_22050 | pcm_24000 | pcm_44100 | pcm_48000 | ulaw_8000 | alaw_8000 | opus_48000_32 | opus_48000_64 | opus_48000_96 | opus_48000_128 | opus_48000_192 | mp3_44100_128 |
| apply_text_normalization | string | No | auto | on | off | auto |
Output
Creating a task does not mean generation has finished. Keep its id, poll until succeeded or failed, then read outputs or error. Amounts below are illustrative; actual charges depend on the request.
queued→processing→succeeded / failed
Task submitted
{
"id": "gen_example",
"object": "generation",
"model": "elevenlabs-tts-v4-turbo",
"type": "audio",
"provider": "fal",
"status": "processing",
"input": {
"prompt": "Welcome back. Let us get started.",
"voice": "Rachel",
"stability": 0.5,
"similarity_boost": 0.75,
"output_format": "mp3_44100_128",
"apply_text_normalization": "auto"
},
"outputs": [],
"error": null,
"credits": 0,
"price_usd": 0,
"created_at": "2026-10-25T08:00:00.000Z",
"completed_at": null
}Task completed
{
"id": "gen_example",
"object": "generation",
"model": "elevenlabs-tts-v4-turbo",
"type": "audio",
"provider": "fal",
"status": "succeeded",
"input": {
"prompt": "Welcome back. Let us get started.",
"voice": "Rachel",
"stability": 0.5,
"similarity_boost": 0.75,
"output_format": "mp3_44100_128",
"apply_text_normalization": "auto"
},
"outputs": [
"https://example.com/output.wav"
],
"error": null,
"credits": 0,
"price_usd": 0,
"created_at": "2026-10-25T08:00:00.000Z",
"completed_at": "2026-10-25T08:01:00.000Z"
}Response fields
| Name | Type | Required | Description |
|---|---|---|---|
| id | string | Yes | Generation ID. Use it to query or cancel this task. |
| object | string | Yes | generation |
| model | string | Yes | elevenlabs-tts-v4-turbo |
| type | string | Yes | audio |
| provider | string | Yes | Provider |
| status | string | Yes | queued → processing → succeeded / failed. Stop polling at either terminal state. |
| input | object | Yes | Model parameters, see the input fields below. |
| outputs | string[] | Yes | Result URLs. Empty while processing; read after succeeded and save the files promptly. |
| error | string | null | Yes | Failure reason, or null when no failure is reported. |
| credits | number | Yes | Credits charged for this request. |
| price_usd | number | Yes | Request price in USD. |
| created_at | string | Yes | Creation time in ISO 8601 format. |
| completed_at | string | null | Yes | Completion time in ISO 8601 format; null before completion. |
Get the result
Poll every few seconds until status is succeeded or failed. Output URLs are provider-hosted and may expire — download them promptly. Or pass callback_url to get the result pushed.
curl "https://01router.com/api/v1/generations/GENERATION_ID" \
-H "Authorization: Bearer $API_KEY"queued → processing → succeeded / failed. Stop polling at either terminal state. Result URLs. Empty while processing; read after succeeded and save the files promptly.
Cancel a task
Cancellation depends on provider support and task state. A confirmed cancellation returns status: failed and error: Canceled by user. Unsupported or completed tasks return 409 not_cancelable.
curl -X POST "https://01router.com/api/v1/generations/GENERATION_ID/cancel" \
-H "Authorization: Bearer $API_KEY"Quote
Same body as creating a generation. Returns every available provider sorted by price, plus the ones that cannot serve the request and why.
curl "https://01router.com/api/v1/quote" -H "Content-Type: application/json" --data-binary @- <<'JSON'
{
"model": "elevenlabs-tts-v4-turbo",
"input": {
"prompt": "Welcome back. Let us get started.",
"voice": "Rachel",
"stability": 0.5,
"similarity_boost": 0.75,
"output_format": "mp3_44100_128",
"apply_text_normalization": "auto"
}
}
JSONModel schema
This public endpoint returns the model parameters and each provider’s supported constraints and prices.
curl "https://01router.com/api/v1/models/elevenlabs-tts-v4-turbo"Errors
Check the HTTP status and error.message. Fix the request before retrying validation or authentication errors. A failed generation is reported in status and error on the task itself.
{
"error": {
"message": "Invalid or missing API key",
"code": "unauthorized"
}
}400Invalid body or parameter value
401Missing or invalid API key
402Not enough credits
404Unknown model or generation
409The task cannot be canceled (already finished, or the provider does not support canceling)
429Too many requests — retry after the given seconds
502Every provider rejected the task (credits refunded)
Use with AI
Give your coding assistant this model reference: endpoints, input constraints, output fields and request examples in plain text.
How does ElevenLabs Eleven v4 Turbo compare?
Specs and starting prices side by side. Test with the same prompt before you choose.
| ElevenLabs Eleven v4 Turbo | ElevenLabs Eleven v4 | Suno V6 | Gemini 3.8 Flash TTS | |
|---|---|---|---|---|
| Vendor | ElevenLabs | ElevenLabs | Suno | |
| Starting price | $0.036 / 1K chars | $0.072 / 1K chars | $0.045 / request | $0.041 / 1K chars |
| Input | Text | Text | Text | Text |
| Provider | 3 providers | 3 providers | 4 providers | 5 providers |
| Stability | 0 – 1 | 0 – 1 | — | — |
| Voice similarity | 0 – 1 | 0 – 1 | — | — |
| Seed | 0 – 4294967295 | 0 – 4294967295 | — | — |
ElevenLabs Eleven v4 Turbo API FAQ
When should I pick v4 Turbo instead of v4?
Choose Turbo when latency and cost matter more than the last bit of expressiveness: rapid prototyping, short social clips, app prompts and high-volume pipelines. Use v4 for long narration and character performances.
Does Turbo support the same parameters as v4?
Yes. It accepts the same voice, stability, similarity_boost, language_code, seed, output_format and text normalization options, so switching is just a change of model.
Can I use audio tags with Turbo?
Yes. Tags like [whispering] or [excited] work the same way and steer the delivery of the following words.
Is the output identical with the same seed?
The seed makes results more repeatable, but identical audio is not guaranteed.
How is it billed on 01router?
Per 1,000 characters of input text, at roughly half the v4 rate. Check the pricing table for exact numbers; failed requests are refunded.
Related models
Other models you can call with the same API key.
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