elevenlabs/tts-eleven-v4

Speech

Type: Speech
Status: Candidate — not yet offered
Price: Not yet priced

Endpoint

POST /v1/audio/speech — answers 202 with a job. Poll GET /v1/jobs/{id}, or receive it by webhook, until its state is final.

Dependencies

No field depends on another.

Request

curl https://api.opinference.com/v1/audio/speech \
  -H "Authorization: Bearer $OP_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "elevenlabs/tts-eleven-v4",
    "prompt": "a paper boat drifting down a rain gutter"
  }'

Response

The job resource once it has succeeded.

{
  "id": "job_01J9K2…",
  "generation_id": "gen_01J9K2…",
  "object": "job",
  "state": "succeeded",
  "modality": "audio_tts",
  "model": "elevenlabs/tts-eleven-v4",
  "created_at": "2026-09-30T08:00:00Z",
  "started_at": "2026-09-30T08:00:04Z",
  "completed_at": "2026-09-30T08:01:12Z",
  "output": [
    {
      "url": "https://…?X-Amz-Signature=…",
      "url_expires_at": "2026-09-30T09:01:12Z",
      "type": "audio/mpeg",
      "bytes": 196413,
      "checksum_sha256": "…"
    }
  ],
  "usage": {
    "units": {
      "audio_second": 12
    }
  }
}

Input

A JSON body. A key not listed here is refused, and the error names it.

Field	Description
modelstring · required	The id of this model.
promptstring · required	The text to speak.Up to 5000 characters
seedinteger	From 0 to 4294967295
modelsstring[]	Other model ids to try, in order, if this one is unavailable. Up to 5.
providerobject	Routing preferences: region, zdr, data_collection, sort, max_price.
opobject	Gateway options: retention (may only tighten), tags, session_id.

Output

A job resource.

Field	Description
id	The job id. Poll GET /v1/jobs/{id} with it.
generation_id	The generation this job belongs to.
object	Always "job".
state	queued, processing, succeeded, failed or canceled. The last three are final.
modality	The kind of output.
model	The model id that was asked for.
created_at	When the job was accepted.
started_at	When work began. Absent while queued.
completed_at	When the job reached a final state.
progress.percent	Percent complete, 0 to 100, or null when not reported.
progress.phase	queued, running or done.
progress.queue_position	Always null today.
output[]	The files produced: url (signed, re-issued on every read), url_expires_at, type, bytes, checksum_sha256.
usage	The billable units the job consumed.
usage.cost	An estimate from the published price: billing_usd, cost_source, cost_status ("estimated") and price_version. Your balance is charged the settled amount.
op_metadata	What applied when the job was accepted: generation_id, requested_model, retention_class, region and policy[].
error	On failure: code, kind and a fixed message for the code.