Flux 1 Srpo API Documentation

Flux 1 Srpo API Documentation

Playground

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 — 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 and inference steps to control realism, style, and variation.

• Resolution Control Flexible output sizes — up to 1024×1024 pixels — 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.

⚙️ Capabilities

• Input: Text prompt

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

• Adjustable Parameters:

• width / height

• num_inference_steps

• guidance_scale

• seed

🧩 Quick Start

1. Write your prompt — describe the scene or concept in detail.

2. Set image size — e.g., 1024×1024 for square artworks.

3. Adjust guidance — balance realism and creativity.

4. Run generation — preview the image; tweak parameters if needed.

5. Download output — available in JPEG or PNG formats.

💰 Pricing

Each generation costs only $0.025 per image.

💡 Best Use Cases

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

📝 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",
  "num_inference_steps": 28,
  "guidance_scale": 3.5,
  "output_format": "jpeg"
}
JSON
)

# 1. Submit the prediction once. Never retry this request automatically:
# a retry after an unclear failure can create a second, billed task.
CHECK='The task may already exist. Check History or the predictions list before submitting again.'
if ! SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  --connect-timeout 10 --max-time 60 \
  -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}"); then
  printf 'Submit failed. %s\n' "${CHECK}" >&2
  exit 1
fi

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 "${PREDICTION_ID}" ]; then
  printf 'Submission response did not contain a prediction id. %s\n' "${CHECK}" >&2
  exit 1
fi
RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/${PREDICTION_ID}/result"

# 2. Poll until the prediction reaches a final status.
BODY_FILE=$(mktemp)
trap 'rm -f "${BODY_FILE}"' EXIT
while true; do
  # Transient errors (429, 5xx) are retried, honoring Retry-After.
  HTTP_CODE=$(curl --silent --show-error --fail-with-body \
    --connect-timeout 10 --max-time 60 --retry 5 --retry-delay 2 \
    --output "${BODY_FILE}" --write-out '%{http_code}' \
    "${RESULT_URL}" \
    -H "Authorization: Bearer ${WAVESPEED_API_KEY}" || true)
  case "${HTTP_CODE}" in
    2??) ;;
    000|429|5??)  # dropped connection or temporary error: keep polling
      printf 'Task %s: HTTP %s, polling again in 10s\n' "${PREDICTION_ID}" "${HTTP_CODE}" >&2
      sleep 10; continue ;;
    *) printf 'Task %s: HTTP %s\n' "${PREDICTION_ID}" "${HTTP_CODE}" >&2
      cat "${BODY_FILE}" >&2; exit 1 ;;
  esac
  RESULT=$(jq 'if type == "object" and has("data") then .data else . end' "${BODY_FILE}")
  STATUS=$(printf '%s' "${RESULT}" | jq -r '.status // empty')

  case "${STATUS}" in
    completed) printf '%s\n' "${RESULT}" | jq '.outputs'; break ;;
    failed|cancelled|timeout|deleted)
      printf 'Task %s ended with status %s\n' "${PREDICTION_ID}" "${STATUS}" >&2
      printf '%s\n' "${RESULT}" | jq . >&2; exit 1 ;;
    *) sleep 2 ;;
  esac
done

Parameters

Task Submission Parameters

Request Parameters

Response Parameters

Result Request Parameters

Result Response Parameters