Seedream 5.0 Lite: Text-to-Image Serverless API

Fast, affordable instruction-following image generation.

~36.06s
POST /v2/seedream-v5-lite-text-to-image · 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    "seedream-v5-lite-text-to-image",
 9    prompt="A futuristic cityscape with flying cars at dusk",
10    aspect_ratio="16:9",
11    size="2K",
12    max_images=1,
13    optimize_prompt="standard",
14    watermark=False,
15)
16print(result["status"])                      # COMPLETED
17print(result.get("output"))                  # model output (e.g. media URL)
18print(result["metrics"]["inference_time"])   # server compute seconds
19
20# --- Or submit + poll manually (track request_id, control the cadence) ---
21from segmind import SegmindClient, InferenceFailed, InferenceTimeout
22
23client = SegmindClient()                      # reads SEGMIND_API_KEY
24payload = {
25    "prompt": "A futuristic cityscape with flying cars at dusk",
26    "aspect_ratio": "16:9",
27    "size": "2K",
28    "max_images": 1,
29    "optimize_prompt": "standard",
30    "watermark": False,
31}
32job = client.submit_async("seedream-v5-lite-text-to-image", **payload)
33print(job.request_id)                         # available immediately
34try:
35    result = job.wait(timeout=600, interval=1.0)
36except InferenceTimeout as e:
37    print("still running:", e.request_id)
38except InferenceFailed as e:
39    print("failed:", e.detail)

API Endpoint

POSThttps://api.segmind.com/v1/seedream-v5-lite-text-to-image

Parameters

promptrequired
string

Describe the image to create with subject and setting.

aspect_ratiooptional
string

Width-to-height ratio. 16:9 for panoramic, 1:1 for square.

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

Number of images to generate. Up to 15 for variations.

Default: 1Range: 1 - 15
optimize_promptoptional
string

Select prompt speed. 'Standard' for accuracy, 'Fast' for quicker outputs.

Default: "standard"
Allowed values :
"standard""fast"
sizeoptional
string

Output resolution. 2K for standard use, 3K for sharpness.

Default: "2K"
Allowed values :
"2K""3K"
watermarkoptional
boolean

Toggle watermark. Use 'true' to embed copyright or 'false' for no watermarking.

Default: false

Response Type

Returns: Text/JSON

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/seedream-v5-lite-text-to-image

    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