Flux 1 Srpo

Flux 1 Srpo

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FLUX.1 SRPO is a 12B-parameter flow transformer that generates high-quality images from text prompts for personal and commercial use. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Features

FLUX.1 SRPO [dev] is a 12-billion-parameter rectified flow transformer built for text-to-image generation with breathtaking quality and artistic coherence. It transforms descriptive prompts into visually striking compositions that balance realism, imagination, and aesthetic precision β€” ideal for both personal and commercial creative work.


🌟 Key Features

  • High-Fidelity Generation Produces detailed, compositionally rich images from even abstract or poetic prompts.

  • Artistic Interpretation Captures lighting, texture, and emotion in a way that feels painterly yet realistic.

  • Configurable Creativity Adjust parameters like guidance scale, inference steps, and strength to control realism, style, and variation.

  • Resolution Control Flexible output sizes β€” up to 1024Γ—1024 pixels β€” perfect for design, print, or digital use.

  • Multi-Format Output Export in JPEG or PNG to fit any creative pipeline.

  • Developer-Friendly [dev] Build Optimized for experimentation and fast inference; ideal for both research and production.


βš™οΈ Capabilities

  • Input: Text prompt

  • Output: High-resolution image (JPEG / PNG)

  • Adjustable Parameters:

  • width / height

  • strength

  • num_inference_steps

  • guidance_scale

  • seed


🧩 Quick Start

  1. Write your prompt β€” describe the scene or concept in detail.

  2. Set image size β€” e.g., 1024Γ—1024 for square artworks.

  3. Adjust strength & guidance β€” balance realism and creativity.

  4. Run generation β€” preview the image; tweak parameters if needed.

  5. Download output β€” available in JPEG or PNG formats.


πŸ’° Pricing

Each generation costs only $0.025 per image.


πŸ’‘ Best Use Cases

  • Concept Art & Illustration β€” Generate imaginative visuals from narrative prompts.
  • Photography & Fashion Design β€” Create surreal or editorial-style compositions.
  • Advertising & Branding β€” Craft eye-catching visuals for campaigns or moodboards.
  • Fine Art Creation β€” Experiment with visual metaphors and artistic reinterpretation.

πŸ“ Notes

  • Prompts with rich visual details yield the most coherent and expressive results.
  • Adjust guidance scale for balance between creativity and accuracy.
  • Available output formats: JPEG and PNG.

Authentication

For authentication details, please refer to the Authentication Guide.

API Endpoints

Submit Task & Query Result

set -euo pipefail

export WAVESPEED_API_KEY="your-api-key"

REQUEST_BODY=$(cat <<'JSON'
{
  "prompt": "A cinematic ocean wave at sunrise, highly detailed",
  "size": "1024*1024",
  "strength": 0.8,
  "num_inference_steps": 28,
  "seed": -1,
  "guidance_scale": 3.5,
  "output_format": "jpeg"
}
JSON
)

# 1. Submit the prediction.
SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  -X POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/flux-1-srpo" \
  -H "Authorization: Bearer ${WAVESPEED_API_KEY}" \
  -H "Content-Type: application/json" \
  -d "${REQUEST_BODY}")

TASK=$(printf '%s' "${SUBMIT_RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
PREDICTION_ID=$(printf '%s' "${TASK}" | jq -r '.id // empty')
if [ -z "${PREDICTION_ID}" ]; then
  printf 'Submission response did not contain a prediction id
' >&2
  exit 1
fi
RESULT_URL=$(printf '%s' "${TASK}" | jq -r '.urls.get // empty')
if [ -z "${RESULT_URL}" ]; then RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/${PREDICTION_ID}/result"; fi

# 2. Poll until the prediction finishes.
while true; do
  RESPONSE=$(curl --silent --show-error --fail-with-body \
    "${RESULT_URL}" \
    -H "Authorization: Bearer ${WAVESPEED_API_KEY}")
  RESULT=$(printf '%s' "${RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
  STATUS=$(printf '%s' "${RESULT}" | jq -r '.status // empty')

  case "${STATUS}" in
    completed) printf '%s\n' "${RESULT}" | jq '.outputs'; break ;;
    failed|cancelled|timeout) printf '%s\n' "${RESULT}" | jq . >&2; exit 1 ;;
    created|processing) sleep 2 ;;
    *) printf 'Unexpected status: %s
' "${STATUS}" >&2; exit 1 ;;
  esac
done

Parameters

Task Submission Parameters

Request Parameters

ParameterTypeRequiredDefaultRangeDescription
promptstringYes-The positive prompt for the generation.
sizestringNo1024*1024-The size of the generated media in pixels (width*height).
strengthnumberNo0.80 ~ 1Strength indicates extent to transform the reference image.
num_inference_stepsintegerNo281 ~ 50The number of inference steps to perform.
seedintegerNo-1-The random seed to use for the generation. -1 means a random seed will be used.
guidance_scalenumberNo3.51 ~ 20The guidance scale to use for the generation.
output_formatstringNojpegjpeg, pngThe format of the output image.
enable_base64_outputbooleanNofalse-If set to `true`, the prediction's `output` strings are returned as **naked base64** (no `data:<mime>;base64,` prefix). When `false` (default), outputs are returned as URLs pointing to our CDN.
enable_sync_modebooleanNofalse-If set to `true`, the request attempts to wait for the generated result and return outputs in the same response. If the result is not ready within the sync wait window, the API can return a timeout body while the task continues processing. This option is only available via the API and is supported only by some models.

Response Parameters

ParameterTypeDescription
codeintegerHTTP status code (e.g., 200 for success)
messagestringStatus message (e.g., β€œsuccess”)
data.idstringUnique identifier for the prediction, Task Id
data.modelstringModel ID used for the prediction
data.outputsarrayOutput values, usually URL strings; some models return text strings or structured result objects (empty when status is not completed)
data.urlsobjectObject containing related API endpoints
data.urls.getstringURL to retrieve the prediction result
data.statusstringStatus of the task: created, processing, completed, or failed
data.created_atstringISO timestamp of when the request was created (e.g., β€œ2023-04-01T12:34:56.789Z”)
data.errorstringError message (empty if no error occurred)
data.timingsobjectObject containing timing details
data.timings.inferenceintegerInference time in milliseconds

Result Request Parameters

ParameterTypeRequiredDefaultDescription
idstringYes-Task ID

Result Response Parameters

ParameterTypeDescription
codeintegerHTTP status code (e.g., 200 for success)
messagestringStatus message (e.g., β€œsuccess”)
dataobjectThe prediction data object containing all details
data.idstringUnique identifier for the prediction
data.modelstringModel ID used for the prediction
data.outputsarray<string | object>Array of generated outputs (empty when status is not completed). Items are usually URL strings, but may be text strings or structured result objects, depending on the model.
data.urlsobjectObject containing related API endpoints
data.urls.getstringURL to poll for the prediction result
data.statusstringStatus: created, processing, completed, or failed
data.created_atstringISO timestamp of when the request was created
data.errorstringError message (empty if no error occurred)
data.timingsobjectObject containing timing details
data.timings.inferenceintegerInference time in milliseconds
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