Grok Text-to-Speech API

Convert text to speech in 20 languages with five voices.

PlaygroundAPI
Pricing
~4.84s
POST /v2/grok-tts · submit + poll
 1# pip install "segmind>=1.1.0"
 2# export SEGMIND_API_KEY="YOUR_API_KEY"
 3import segmind
 4
 5# Async (v2): submit to the queue and block until COMPLETED.
 6# run() returns the final result dict (600s deadline, 1.0s poll by default).
 7result = segmind.run(
 8    "grok-tts",
 9    text="Welcome to Segmind! With Grok text-to-speech, you can turn any script into natural, expressive narration in just seconds.",
10    voice_id="eve",
11    language="en",
12    codec="mp3",
13    speed=1,
14)
15print(result["status"])                      # COMPLETED
16print(result.get("output"))                  # model output (e.g. media URL)
17print(result["metrics"]["inference_time"])   # server compute seconds
18
19# --- Or submit + poll manually (track request_id, control the cadence) ---
20from segmind import SegmindClient, InferenceFailed, InferenceTimeout
21
22client = SegmindClient()                      # reads SEGMIND_API_KEY
23payload = {
24    "text": "Welcome to Segmind! With Grok text-to-speech, you can turn any script into natural, expressive narration in just seconds.",
25    "voice_id": "eve",
26    "language": "en",
27    "codec": "mp3",
28    "speed": 1,
29}
30job = client.submit_async("grok-tts", **payload)
31print(job.request_id)                         # available immediately
32try:
33    result = job.wait(timeout=600, interval=1.0)
34except InferenceTimeout as e:
35    print("still running:", e.request_id)
36except InferenceFailed as e:
37    print("failed:", e.detail)

API Endpoint

POSThttps://api.segmind.com/v1/grok-tts

Parameters

textrequired
string

Text to synthesize, up to 15,000 characters with inline tags. Use punctuation for natural pacing.

Default: "Welcome to Segmind! With Grok text-to-speech, you can turn any script into natural, expressive narration in just seconds."
codecoptional
string

Audio format: mp3, wav, pcm, mulaw, alaw. Use mp3 for web, mulaw for telephony.

Default: "mp3"
Allowed values :
"mp3""wav""pcm""mulaw""alaw"
languageoptional
string

BCP-47 code across 20 languages, or auto-detect. Match it to your script.

Default: "en"
speedoptional
number

Speech speed multiplier from 0.7 to 1.5. Keep 1.0 for natural narration.

Default: 1Range: 0.7 - 1.5
voice_idoptional
string

Voice from ara, eve, leo, rex, sal. Eve suits demos; rex suits business.

Default: "eve"
Allowed values :
"ara""eve""leo""rex""sal"

Response Type

Returns: Audio

Asynchronous requests (v2)

Use Async for video, long-running (>~60s), or high-concurrency workloads; Sync is simplest for fast image & LLM calls. Async submits a request and you poll it to completion.

  1. 1
    POST /v2/grok-tts

    Submit — returns request_id, status_url, response_url

  2. 2
    GET /v2/requests/{id}/status

    Poll — until COMPLETED or FAILED

  3. 3
    GET /v2/requests/{id}

    Result — final response body

Status states

QUEUED— Accepted, waiting for a worker
PROCESSING— Running on a worker
COMPLETED— Done — result body is ready
FAILED— Errored (incl. content/RAI blocks)
  • A FAILED request is served as HTTP 422 — the body still carries the error detail.
  • An unknown or expired request_id returns HTTP 404.
  • Results are retained for 1 hour, then expire.
  • Content / RAI blocks surface as FAILED, not a separate state.
  • Track completion by polling the status endpoint.

Common Error Codes

The API returns standard HTTP status codes. Detailed error messages are provided in the response body.

400

Bad Request

Invalid parameters or request format

401

Unauthorized

Missing or invalid API key

403

Forbidden

Insufficient permissions

404

Not Found

Model or endpoint not found

406

Insufficient Credits

Not enough credits to process request

429

Rate Limited

Too many requests

500

Server Error

Internal server error

502

Bad Gateway

Service temporarily unavailable

504

Timeout

Request timed out