FLUX.1 Krea Dev LoRA API

Introduction

FLUX.1 Krea Dev LoRA Text to image draws one image from a written prompt on FLUX.1 Krea [dev], the open-weights version of Krea 1 that Black Forest Labs released with Krea, with up to three of your own LoRA files loaded. Krea [dev] is a 12-billion-parameter model tuned for photography that avoids the glossy, oversaturated "AI look", and it shares the FLUX.1 [dev] architecture, so LoRAs built for FLUX.1 [dev] load on it.

Choose a mode by starting material

Key features

A photographic look by default

With no LoRA loaded, our test prompts came back with muted colour, real-looking skin, warm practical light and visible film grain. Ask for "film photograph" or "35mm film still" and that is what you get, without stacking style words.

FLUX.1 [dev] LoRAs load here

Up to three LoRAs per request, each with a scale from 0 to 4.

Style LoRAs need a higher scale

Krea's own look is strong. A cartoon LoRA that works at 1.2 on FLUX.1 [dev] still came back photographic here.

Request parameters

Pricing

Prices are in credits, the same credits you use on the website (1 credit = $0.01). The hold is taken when the task is accepted and settled to the actual charge when it finishes; failed tasks are refunded.

Each task is rounded up to whole credits, so one run at the lowest tier costs 4 credits per image ($0.04).

For an exact number before you run, send the same body to POST /jobs/quote.

Use cases

Editorial and fashion stills

Night-time interiors, warm lamps, film grain and believable skin straight from a sentence prompt, in nine shapes from 21:9 to 9:21.

A house style for a set

Load one style LoRA at 1.5 to 2, keep its trigger phrase at the front and run a list of prompts. Every image in the set shares the look.

Your FLUX LoRAs on a more photographic base

If you already use FLUX.1 [dev] LoRAs, run them here to get the same subject or style with a quieter, more photographic finish.

Prompt guide & pro tips

Write it like a shot list

Subject, clothing, place, light source and lens, in sentences. Naming the light ("a brass desk lamp", "a string of warm bulbs") does more than adjectives such as "moody".

Start style LoRAs high

Begin at scale 1.5 for a style LoRA and compare with scale 0 on the same seed. If the two images match, the file did not apply; if the style is faint, go to 2.

Leave guidance near 3.5

Guidance runs from 0 to 20. In our tests 0 came back washed out and grainy, 1 softer, 7 harder and more contrasty, and 20 overcooked the shadows and changed the outfit.

Expect labels and logos

Like other FLUX models it sometimes prints small fake lettering on props such as headphones, sleeves and signs. Describe props as plain or unmarked, and try another seed if a logo appears.

API quick start

Call the FLUX.1 Krea Dev LoRA API in three steps

1. Create an API key. Sign in to PopNow and create a key in the API console. Keys start with sk-popnow- and use the same credits as the website.
2. Send the request. POST /jobs/createTask with model black-forest-labs/flux-1-krea-dev-lora/text-to-image and an input object that follows the parameter table. The response returns a task ID straight away.
3. Get the result. Poll GET /jobs/recordInfo with the task ID, or pass a callBackUrl and we post the result to it. Download the output links when the task succeeds.

# 1. Create the task. Keep the Idempotency-Key if you retry after a network error.
export IDEMPOTENCY_KEY="$(uuidgen)"
curl -X POST https://api.popnow.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $IDEMPOTENCY_KEY" \
  -d '{
  "model": "black-forest-labs/flux-1-krea-dev-lora/text-to-image",
  "input": {
    "prompt": "A ceramic teapot on a linen cloth, soft window light, muted palette",
    "aspect_ratio": "1:1",
    "output_format": "jpeg"
  }
}'

# 2. Copy data.taskId from the response, then poll until state is succeeded, failed, canceled or expired.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

Replace the prompt and any links with your own. The API tab has the response, polling and callback reference.

FLUX.1 Krea Dev LoRA API questions

All FLUX models

FLUX.1 Dev LoRA applies style LoRAs at full strength without Krea's photographic bias.

• FLUX.2 Max APITop-tier FLUX: photoreal light and exact brand colorsFrom 11 credits per image
• FLUX 3 APIVideo with synced sound and a quick draft tierFrom 45 credits for a 5-second clip
• FLUX.2 Klein 9B LoRA APIFast FLUX.2 Klein 9B that loads up to three of your LoRAsFrom 3 credits per image
• FLUX.2 Klein Base 9B LoRA APIUndistilled Klein 9B for varied looks with your LoRAsFrom 4 credits per image
• FLUX.2 Klein 4B LoRA APISmall, quick FLUX.2 Klein 4B with your own LoRAsFrom 3 credits per image
• FLUX.2 Klein Base 4B LoRA APIUndistilled Klein 4B that loads your own LoRAsFrom 3 credits per image
• FLUX.2 Klein 9B APIFast FLUX edits that keep faces and poses intactFrom 2 credits per image
• FLUX.2 Klein 4B APIThe smallest, quickest FLUX for rapid draftsFrom 2 credits per image
• FLUX.2 Dev LoRA APIFLUX.2 Dev images and edits with your own LoRAsFrom 4 credits per image
• FLUX.2 Pro APIPhotoreal images with readable text and hex color controlFrom 5 credits per image
• FLUX.2 Flex APISpells headlines and labels exactly as writtenFrom 9 credits per image
• FLUX.2 Dev APIOpen-weights FLUX that can merge people into one sceneFrom 2 credits per image
• FLUX.1 Krea Dev LoRA APIPhotographic FLUX.1 Krea with your own LoRAsFrom 4 credits per image
• FLUX.1 Dev ControlNet LoRA APIPose, depth or edge control on FLUX.1 with your LoRAsFrom 6 credits per image
• FLUX.1 Fill Dev LoRA APIMasked inpainting on FLUX.1 Fill with your own LoRAsFrom 7 credits per image
• FLUX.1 Dev LoRA APIClassic FLUX.1 Dev with up to three of your LoRAsFrom 3 credits per image
• FLUX.1 Schnell LoRA APIFast FLUX.1 Schnell that loads your own LoRAsFrom 1 credit per image

Other image APIs

• Qwen Image 2.1 LoRA APIQwen Image 2.1 images and edits with up to three of your LoRAsFrom 5 credits per image
• MiniMax H3 Image LoRA APIH3 stills and edits with up to three of your LoRAsFrom 7 credits per image
• Anima Turbo LoRA APIAnime art with your own style or character LoRAsFrom 3 credits per image
• Krea 2 Turbo LoRA APIKrea 2 Turbo images and restyles with your own LoRAsFrom 4 credits per image
• P-Image LoRA APIFast P-Image renders and edits with one LoRA of your ownFrom 1 credit per image
• Z-Image Base LoRA APIZ-Image Base with up to three of your own LoRAsFrom 3 credits per image

More about FLUX.1 Krea Dev LoRA

Try it

FLUX.1 Krea Dev LoRA AI Image Generator onlineCreate images with FLUX.1 Krea Dev LoRA in PopNow

Docs

FLUX.1 Krea Dev LoRA model ID and input schema in the API docsPopNow API quickstart: your first request in five minutesImage generation guide for the PopNow APIWebhooks: get FLUX.1 Krea Dev LoRA results without polling