Whisper Large V3 Serverless API

Transcribe speech-to-text in 99 languages with timestamps.

POST /v2/whisper-large-v3 · 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    "whisper-large-v3",
 9    audio_url="https://segmind-resources.s3.amazonaws.com/input/whisper-large-v3-input.mp3",
10    task="transcribe",
11    language="en",
12    max_segment_len=29,
13    merge_chunks=True,
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    "audio_url": "https://segmind-resources.s3.amazonaws.com/input/whisper-large-v3-input.mp3",
25    "task": "transcribe",
26    "language": "en",
27    "max_segment_len": 29,
28    "merge_chunks": True,
29}
30job = client.submit_async("whisper-large-v3", **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/whisper-large-v3

Parameters

audio_urlrequired
string (uri)

URL of the audio file to transcribe. Supported formats: mp3, mp4, mpeg, mpga, m4a, wav, webm.

Default: "https://segmind-sd-models.s3.amazonaws.com/display_images/sad_talker/sad_talker_audio_input.mp3"
languageoptional
string

Language spoken in the audio. Auto-detect adds a little latency.

Default: "en"
Allowed values (100 total):
Auto-detect"auto"
Afrikaans"af"
Albanian"sq"
Amharic"am"
Arabic"ar"
Armenian"hy"
Assamese"as"
Azerbaijani"az"
Bashkir"ba"
Basque"eu"
+90 more
max_segment_lenoptional
integer

Maximum speech segment duration in seconds before splitting.

Default: 29Range: 10 - 29
merge_chunksoptional
boolean

Merge consecutive chunks while their combined duration stays under the max segment length.

Default: true
taskoptional
string

Transcribe keeps the source language; translate outputs English.

Default: "transcribe"
Allowed values :
Transcribe"transcribe"
Translate to English"translate"

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/whisper-large-v3

    Submitreturns request_id, status_url, response_url

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

    Polluntil COMPLETED or FAILED

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

    Resultfinal response body

Status states

QUEUEDAccepted, waiting for a worker
PROCESSINGRunning on a worker
COMPLETEDDone — result body is ready
FAILEDErrored (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