Flux Redux Dev Serverless API

Open-weight image variation model. Create new versions while preserving key elements of your original.

~15.84s
POST /v2/flux-redux-dev · 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    "flux-redux-dev",
 9    seed=30255,
10    guidance=3,
11    megapixels="1",
12    num_outputs=1,
13    redux_image="https://segmind-sd-models.s3.us-east-1.amazonaws.com/display_images/flux-tools/flux-dev-redux-ip.png",
14    aspect_ratio="1:1",
15    output_format="jpg",
16    output_quality=80,
17    num_inference_steps=28,
18    disable_safety_checker=False,
19)
20print(result["status"])                      # COMPLETED
21print(result.get("output"))                  # model output (e.g. media URL)
22print(result["metrics"]["inference_time"])   # server compute seconds
23
24# --- Or submit + poll manually (track request_id, control the cadence) ---
25from segmind import SegmindClient, InferenceFailed, InferenceTimeout
26
27client = SegmindClient()                      # reads SEGMIND_API_KEY
28payload = {
29    "seed": 30255,
30    "guidance": 3,
31    "megapixels": "1",
32    "num_outputs": 1,
33    "redux_image": "https://segmind-sd-models.s3.us-east-1.amazonaws.com/display_images/flux-tools/flux-dev-redux-ip.png",
34    "aspect_ratio": "1:1",
35    "output_format": "jpg",
36    "output_quality": 80,
37    "num_inference_steps": 28,
38    "disable_safety_checker": False,
39}
40job = client.submit_async("flux-redux-dev", **payload)
41print(job.request_id)                         # available immediately
42try:
43    result = job.wait(timeout=600, interval=1.0)
44except InferenceTimeout as e:
45    print("still running:", e.request_id)
46except InferenceFailed as e:
47    print("failed:", e.detail)

API Endpoint

POSThttps://api.segmind.com/v1/flux-redux-dev

Parameters

redux_imagerequired
string (uri)

Input image to condition your output on. This replaces prompt for FLUX.1 Redux models

Default: "https://segmind-sd-models.s3.us-east-1.amazonaws.com/display_images/flux-tools/flux-dev-redux-ip.png"
aspect_ratiooptional
string

Aspect ratio for the generated image

Default: "1:1"
Allowed values (11 total):
"1:1""16:9""21:9""3:2""2:3""4:5""5:4""3:4""4:3""9:16"+1 more
disable_safety_checkeroptional
boolean

Disable safety checker for generated images.

Default: false
guidanceoptional
number

Guidance for generated image

Default: 3Range: 0 - 10
megapixelsoptional
number

Approximate number of megapixels for generated image. Use match_input to match the size of the input (with an upper limit of 1440x1440 pixels)

Default: 1
Allowed values :
10.25
num_inference_stepsoptional
integer

Number of denoising steps. Recommended range is 28-50

Default: 28Range: 1 - 50
num_outputsoptional
integer

Number of outputs to generate

Default: 1Range: 1 - 4
output_formatoptional
string

Format of the output images

Default: "jpg"
Allowed values :
"webp""jpg""png"
output_qualityoptional
integer

Quality when saving the output images, from 0 to 100. 100 is best quality, 0 is lowest quality. Not relevant for .png outputs

Default: 80Range: 0 - 100
seedoptional
integer

Random seed. Set for reproducible generation

Default: 30255

Response Type

Returns: Image

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-redux-dev

    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