FLUX 3 Max Text to Video API

Text-to-video with native audio, up to 20 seconds, 1080p.

PlaygroundAPI
Pricing
~19.22s
POST /v2/flux-3-max-text-to-video · submit + poll
 1# pip install "segmind>=1.1.0"
 2# export SEGMIND_API_KEY="YOUR_API_KEY"
 3from segmind import SegmindClient, InferenceFailed, InferenceTimeout
 4
 5# Async (v2) — recommended for long-running / video models.
 6# run() blocks up to 600s; submit_async + job.wait(timeout=...) sets a longer
 7# deadline and keeps the request_id so you can re-poll later.
 8client = SegmindClient()                      # reads SEGMIND_API_KEY
 9payload = {
10    "prompt": "Three taiko drummers in indigo happi coats drive their wooden bachi into a huge nagado-daiko and two shime-daiko in unison, lunging low on every downbeat, sweat flicking off their arms; a hanging red paper lantern sways behind them on a wooden matsuri stage. The camera dollies laterally past them at the height of the drum skins. Audio: thunderous synchronized drum booms locked to each strike, sharp rim clacks, a shouted 'Sore!', a crowd murmuring in the dark.",
11    "duration": 5,
12    "resolution": "720p",
13    "aspect_ratio": "16:9",
14    "generate_audio": True,
15    "reasoning_level": "high",
16    "seed": 94355960,
17}
18job = client.submit_async("flux-3-max-text-to-video", **payload)
19print(job.request_id)                         # available immediately
20try:
21    result = job.wait(timeout=900, interval=2.0)
22    print(result["status"])                  # COMPLETED
23    print(result.get("output"))              # model output (e.g. video URL)
24except InferenceTimeout as e:
25    print("still running:", e.request_id)    # re-poll later with this id
26except InferenceFailed as e:
27    print("failed:", e.detail)
28
29# Fast models (<=600s) can use the one-liner instead:
30# result = segmind.run("flux-3-max-text-to-video", **payload)

API Endpoint

POSThttps://api.segmind.com/v1/flux-3-max-text-to-video

Parameters

promptrequired
string

Describe the scene, subject, motion, camera and sound.

Default: "A red panda walks along a mossy log in a sunlit forest, pausing to sniff the air before climbing over a fallen branch. Soft morning light filters through the canopy. Ambient birdsong and rustling leaves."
aspect_ratiooptional
string

'auto' uses 16:9.

Default: "auto"
Allowed values :
"auto""21:9""2:1""16:9""4:3""1:1""3:4""9:16"
durationoptional
integer

Length of the video, 5 to 20 seconds. Billed per second of output.

Default: 5Range: 5 - 20
generate_audiooptional
boolean

Native synchronized audio. Off for a silent clip.

Default: true
reasoning_leveloptional
string

How much the model reasons about the prompt before rendering. 'low' is faster.

Default: "high"
Allowed values :
Low→"low"
High→"high"
resolutionoptional
string

Output resolution. 1080p costs more per second than 720p.

Default: "720p"
Allowed values :
"720p""1080p"
seedoptional
integer

Seed for reproducible generation. -1 for random.

Default: -1Range: -1 - 999999999999999

Response Type

Returns: Video

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/flux-3-max-text-to-video

    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