Flux 2 Klein 9b Edit

Flux 2 Klein 9b Edit

Playground

FLUX.2 [klein] 9B Edit is a high-quality image editing model with 9B parameters, offering precise modifications using natural language instructions. Ready-to-use REST inference API, best performance, no cold starts, affordable pricing.

Features

FLUX.2 Klein 9B Edit is a powerful image editing model with 9B parameters. Upload images and describe your edits in natural language — the model delivers higher quality transformations and better prompt understanding than the 4B variant.

Why Choose This?

• Enhanced editing quality 9B parameter model delivers richer detail and better prompt interpretation than the 4B variant.

• Text-guided editing Describe edits in natural language — transform styles, modify content, combine elements, and more.

• Multi-image input Upload multiple reference images and combine elements across them (e.g., “Put the person in image1 into image2”).

• Flexible output sizing Optionally set output size, or leave empty to match input image dimensions.

• Prompt Enhancer Built-in tool to automatically improve your prompts for better results.

Parameters

How to Use

1. Write your prompt — describe the edit you want (e.g., “Put the person in image1 into image2”, “Change to watercolor style”).
2. Upload images — add source images using ”+ Add Item” button.
3. Set size (optional) — specify output dimensions or leave empty to match input.
4. Set seed — use -1 for random, or specify a number for reproducibility.
5. Run — submit and download the edited image.

Pricing

Simple flat-rate pricing regardless of image size.

Best Use Cases

• Image Compositing — Combine elements from multiple images seamlessly.
• Style Transfer — Transform images to different artistic styles with high fidelity.
• Professional Editing — When 4B quality isn’t enough for production work.
• Content Transformation — Change moods, lighting, or visual themes with precision.
• Complex Edits — Multi-image operations that require better understanding.

Pro Tips

• Be specific in your prompt — clearly describe what should change.
• Reference images by number in prompts (e.g., “Put the person in image1 into image2”).
• Leave size empty to preserve original image dimensions.
• Use the same seed to compare different prompts on the same images.

Notes

• If size is not specified, output matches input image dimensions.
• 9B model offers better detail than 4B at slightly higher cost.
• Need LoRA support? Try FLUX.2 Klein 9B Edit LoRA.

Related Models

• FLUX.2 Klein 9B Edit LoRA — Edit with LoRA support for custom styles.
• FLUX.2 Klein 4B Edit — Lighter 4B version at lower cost.
• FLUX.2 Klein 9B Text-to-Image — Text-to-image generation.

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",
  "images": [
    "https://interactive-examples.mdn.mozilla.net/media/cc0-images/painted-hand-298-332.jpg"
  ],
  "seed": -1
}
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-2-klein-9b/edit" \
  -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

Response Parameters

Result Request Parameters

Result Response Parameters