Which LoRAs work here?

LoRAs trained for FLUX.2 [klein] 9B, including those trained on its Base build: in our tests a LoRA trained on Base for the stronger levels loaded on this distilled model and changed the result as expected. FLUX.1 and klein 4B LoRAs ran without an error and changed nothing.

Should I use this or FLUX.2 Klein Base 9B LoRA?

This is the step-distilled build: renders in about ten seconds and holds a polished, photographic look. Base is the undistilled build its makers recommend for training; it took two to five times longer in our tests and gave softer, more varied pictures. The same LoRAs load on both, so you can train on Base and run here.

Can I use uncensored LoRAs for NSFW images?

Yes. LoRA files are not reviewed and the output is not filtered. Without a LoRA the model tends to cover or crop at the Strong level and tone down the Very strong level; LoRAs trained for that content on klein 9B removed that in our tests.

Why did my LoRA request fail?

Usually the link needs a login (gated Hugging Face files answer with HTTP 401) or points to the repository page instead of the file. Use a public URL that downloads the .safetensors file itself. Failed requests are not charged.

My LoRA loaded but nothing changed. Why?

Three causes in our tests: the file was trained for another model (FLUX.1 or klein 4B), it was saved in diffusers PEFT format (keys ending in .default.weight), or it is a style LoRA whose look the prompt already asks for. None of these raise an error. Compare the same seed with and without the file.

Each endpoint has one flat price per image. The aspect ratio, 1k or 2k, the number of edit sources and loading LoRAs do not change it. Failed requests are not charged.

FLUX.2 Klein 9B LoRA API: Uncensored NSFW Images, Your LoRAs

black-forest-labs/flux-2-klein-9b-lora/edit

FLUX.2 Klein 9B LoRA image editing changes one to three source images from an instruction on Black Forest Labs' FLUX.2 [klein] 9B, with up to three of your own LoRA files. It keeps the person while the outfit, place or look changes, with no content filter.

From $0.025/image

Run model View API

Input

Image editing

Prompt339/5000

Reordering updates prompt references. Removing media also removes its references; review your prompt.

Images2/3

Drop files or media links, paste, or browse · Up to 3 files · Max 10 MB · JPG · PNG · WEBP · GIF

image 1
image 2

Aspect ratio

Resolution

Style LoRAs1/3

ANALOG REDMOND FLUXKLEIN9B

Seed

Safety checkerOff

SpicyAPI does not run a safety checker on this model. Your prompt and media go to the model as written, and the model itself decides what comes back.

Checking your account before enabling submission and pricing.

Output

Ready for a new run

Example result

Animate

Edit

Split into layers

{
  "model": "black-forest-labs/flux-2-klein-9b-lora/edit",
  "input": {
    "image_urls": [
      "https://cdn.spicyapi.ai/models/examples/inputs/2504351fd055c10d.jpeg",
      "https://cdn.spicyapi.ai/models/examples/inputs/165e44396f123212.jpeg"
    ],
    "aspect_ratio": "3:2",
    "resolution": "1k",
    "loras": [
      {
        "path": "https://huggingface.co/artificialguybr/ANALOG-REDMOND-FLUXKLEIN9B/resolve/main/%5BFLUX.2.Klein%5DAnalog_Redmond.safetensors",
        "scale": 0.8
      }
    ],
    "seed": 202,
    "prompt": "AnalogRedmAF, Analog. The woman from image 1 and the man from image 2 stand close together at the edge of a brutalist concrete fountain at night, jets lit from below. She wears a red off-the-shoulder dress, he wears a charcoal suit with an open-collar shirt and rests a hand on her waist. Keep both faces. 35mm film photograph, warm grain."
  }
}

Introduction

FLUX.2 Klein 9B LoRA Image editing changes one to three source images from a written instruction on Black Forest Labs' step-distilled FLUX.2 [klein] 9B, with up to three of your own LoRA files loaded. Keep the source shape with auto or pick one of nine shapes at 1k or 2k. Most edits took about ten seconds of model time, there is no mask or strength control to tune, and nothing is filtered.

Choose a mode by starting material

What you have	Mode
a written description and a LoRA	FLUX.2 Klein 9B LoRA Text to image
one to three images to change	FLUX.2 Klein 9B LoRA Image editing

Key features & highlights

Same person, new scene

In our tests the face and hair carried through changes of outfit and place: a man on a park bench in a hoodie came back on a car park roof at dusk in an open-collar shirt, still clearly the same person.

Up to three sources

Two head-and-shoulders portraits taken apart became one couple at a lit fountain, each keeping their face. With two or three sources, faces and hair can drift a little, so check each person before you use the result.

LoRAs on edits

A film or analog LoRA sets the grade of the edited picture. Concept LoRAs change what is drawn, and a heavy one can also shift a face or skin tone away from the source; lower its scale when that happens.

Request parameters

Request parameters for FLUX.2 Klein 9B LoRA · Image Editing
Parameter	Required	Description
`prompt`	Yes	Required, up to 5,000 characters. Name what must stay (face, hair, pose) and then the change. at least 1 characters · at most 5000 characters
`image_urls`	Yes	Required, one to three public image links, up to 10 MB each, in the order your prompt refers to them. A link that does not open or is not an image fails the request. at least 1 items · at most 3 items
`aspect_ratio`	No	auto (default) keeps the shape of the first source at about one megapixel: a 1328 x 1776 portrait came back as 880 x 1184. Or choose one of nine shapes from 21:9 to 9:21. `auto` · `1:1` · `16:9` · `9:16` · `4:3` · `3:4` · `3:2` · `2:3` · `21:9` · `9:21` · Default: `auto`
`resolution`	No	1k (default) or 2k, used when you choose an aspect ratio; ignored with auto. Does not change the price. `1k` · `2k` · Default: `1k`
`loras`	No	Up to three {path, scale} entries trained for FLUX.2 [klein] 9B, distilled or Base; scale 0 to 4, 1 by default. Default: `[]` at most 3 items
`seed`	No	Optional, 0 to 2,147,483,647. Reuse it to compare prompt or LoRA changes; it does not promise an identical image. `≥ 0` · `≤ 2147483647`

Pricing

$0.025 / image

Billed per image at one flat price. The number of sources, the size tier and loading LoRAs do not change the price.

Use cases

Wardrobe and location changes

Move a person into a new place and outfit in one pass while keeping their likeness, for lookbooks, mood boards and character sheets.

Putting people together

Combine two or three portraits into one scene, then restyle the result with a LoRA so the series matches.

Fast retouch rounds

At about ten seconds per edit you can try several instructions and LoRA strengths on the same photo and keep the best version, instead of settling for the first attempt.

Explore key use-case tutorials

Prompt guide & pro tips

Protect first, then change

Start the instruction with what must stay the same, such as face, hair and expression, then describe the change in concrete terms: the garment, the place and the light. Short, specific instructions held faces better than long lists in our tests.

Give each source a role

With several images, say what each one brings: the woman from the first image, the man from the second, the room from the third. The order in your prompt should match the upload order.

Lower a LoRA that changes faces

If the person stops looking like the source, take the LoRA scale down by 0.2 and run the same seed again. Heavy concept LoRAs are the usual cause; style LoRAs rarely move a face.

API quick start

# Generate the idempotency key once; reuse it when retrying after a lost response.
export SPICY_IDEMPOTENCY_KEY="${SPICY_IDEMPOTENCY_KEY:-$(uuidgen)}"
curl -X POST https://api.spicyapi.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $SPICY_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $SPICY_IDEMPOTENCY_KEY" \
  -d '{
  "model": "black-forest-labs/flux-2-klein-9b-lora/edit",
  "input": {
    "aspect_ratio": "auto",
    "image_urls": [
      "https://example.com/reference.png"
    ],
    "prompt": "A ceramic teapot on a linen cloth, soft window light, muted palette",
    "resolution": "1k"
  }
}'

# Copy data.taskId from the response into TASK_ID, then poll the status.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.spicyapi.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $SPICY_API_KEY"

See the API reference for authentication, the complete schema, polling, and error handling.

Missing the model you need?

Tell us what to add and where you would use it. Requests go to the people who decide what gets onboarded next.

LORA IMAGE API

FLUX.2 Klein 9B LoRA API at a glance

FLUX.2 [klein] 9B with up to three of your own LoRAs: fast text to image and editing at 1k or 2k, with no content filter.

LoRAs per call: 3; Up to three weight files per image, each with its own strength from 0 to 4.
Typical render: ~10 s; Median model time across our test runs at both size tiers, text to image and editing.
Largest size tier: 2k; 2048 pixels on the long side; 1k is about one megapixel. Both cost the same.
Edit references: 1 – 3; Combine or restyle up to three source images in one edit.
Klein 9B builds: Both; LoRAs trained on the distilled 9B or on Base 9B both loaded in our tests.
Content filter: None; No review of your LoRAs and no filter on the result.

Results

What you can make with FLUX.2 Klein 9B LoRA

Film look LoRA
A trigger phrase and a whole grade
A cinematic film-still LoRA at 0.9 with its trigger first: the empty car park, sodium lamps and violet sky come back with an anamorphic look and teal-and-amber grade, at 2048 by 1152.
Text to image with a film-still LoRA at 0.9, 16:9 at 2k.
Style LoRA
The same model, drawn in pixels
A pixel-art LoRA trained for klein 9B, with its trigger words, on a moonlit concrete amphitheatre. The words alone already gave pixel art; the LoRA coarsened the pixel grid and added dithered shading.
Text to image with a pixel-art LoRA at 0.8, 16:9.
Edit with two sources
Two portraits, one night out
Two separate head-and-shoulders photos became one couple at a lit fountain, with new clothes and an analog flash look from a LoRA.
Edit combining two portraits with an analog-photo LoRA, 3:2.

More clips made with FLUX.2 Klein 9B LoRA

Edit of one street photo with a film-still LoRA, auto shape.
Edit of one park photo without a LoRA, 16:9 at 2k.
Text to image with an analog-photo LoRA at 0.9, 2:3.
Text to image without a LoRA, 3:2 at 2k.

Content test

Is FLUX.2 Klein 9B LoRA uncensored? What we tested

We ran each level on our live setup and checked every clip frame by frame. A pass means the content was actually on screen, not just that the request went through.

Content levels tested on FLUX.2 Klein 9B LoRA, by mode
Level	Image editing	Text to image
MildThe lightest prompts in the test	RendersTested Oct 9, 2026	RendersTested Oct 9, 2026
ModerateWhere filtered models start to refuse	RendersTested Oct 9, 2026	RendersTested Oct 9, 2026
StrongThe middle of the scale	RendersTested Oct 9, 2026	RendersTested Oct 9, 2026
Very strongWhere most models start to hold back	RendersTested Oct 9, 2026	RendersTested Oct 9, 2026
MaximumThe top of the scale	RendersTested Oct 9, 2026	RendersTested Oct 9, 2026

Renders: on screen as written. Softened: generated, but milder than what was written. Refused: rejected. Not tested yet: we have not run that level on that mode.

How each mode behaves

All modes: Use LoRAs trained for FLUX.2 [klein] 9B, the distilled or the Base build. FLUX.1 [dev] and klein 4B LoRAs loaded without an error and changed nothing in our tests, and so did a file saved in diffusers PEFT format. A link that needs a login or points to a web page fails the request. Up to three LoRAs, scale 0 to 4. There is no negative prompt and no step or guidance control; output is JPEG, one image per request.
All modes: There is no content filter. On its own the model holds back: in our tests it toned the Strong level down by cropping or covering, softened a male subject the same way, and stopped short of the Very strong level. With LoRAs trained for that content on klein 9B loaded, both the Strong and Very strong levels rendered as asked. A heavy LoRA can also change a face, skin tone or framing, so lower the scale if the person drifts.
Image editing: Editing takes one to three sources. With auto the result keeps the first image's shape at about one megapixel; choose a ratio for the 1k or 2k tier. With two or more sources, faces and hair can drift, so check each person.
All modes: Every person you describe or upload must be an adult. You are responsible for the lawfulness of what you generate and publish, including the rights of anyone shown in a source image. Generated media is retained for 14 days and then deleted.

Use cases

What to build with the FLUX.2 Klein 9B LoRA API

The LoRA you already found
A klein 9B style, character or look from a model hub becomes a plain API call: paste the file link, set the scale, write the prompt.
Restyle and recast photos
Editing keeps a person and changes the outfit, the place or the light, with a LoRA setting the look.
Fast series and drafts
About ten seconds per image makes it practical to try many seeds, wordings and LoRA strengths in one session.
LoRAs for what the base holds back
Nothing is reviewed or filtered. LoRAs trained for klein 9B are how you get past what the base model holds back on its own.

Prompts

FLUX.2 Klein 9B LoRA prompt examples you can copy

Paste one into the playground as it is, then change one thing at a time.

Text to image
Rooftop car park at dusk
Cinematic, Film Still. Dusk on the top level of an empty multi-storey car park built of raw board-marked concrete, sodium lamps flickering on, a violet sky beyond the open edge. A woman in her early thirties with South Asian features and long dark hair leans against a concrete pillar in a black satin slip dress, one thin strap fallen to her upper arm, the wind lifting her hair, giving the camera a smouldering glance over her shoulder. Anamorphic 40mm lens, shallow depth of field, teal and amber grade, fine film grain.
Why it works. A film-still LoRA for klein 9B at 0.9 with its trigger "Cinematic, Film Still." first, 16:9 at 2k. Against the same seed without it, the LoRA pulled the grade toward teal and amber and deepened the shadows.
Try this prompt
Image editing
Trench coat to satin on the stairwell
Cinematic, Film Still. Keep her face, hair and expression. Move her to the landing of a raw concrete stairwell lit by a single hard shaft of light from above, and change the trench coat to a black satin slip dress with a low neckline. Deep shadows, teal and amber grade, film grain.
Why it works. One street photo, auto shape, the film-still LoRA at 0.8. Her face, hair and expression stay; the coat becomes a black satin slip dress and the street a concrete stairwell under one shaft of light.
This mode starts from your own image: add it in the playground before you run.
Try this prompt
Text to image
A shaft of light in a concrete stairwell
AnalogRedmAF, Analog. Looking up a raw concrete spiral stairwell, one hard shaft of daylight falling from a skylight. A man in his late thirties with dark brown skin and a close-cropped beard leans on the curved concrete balustrade in a cream linen shirt open at the collar, sleeves rolled to the elbow, looking down into the lens with a slow, confident half-smile. 35mm film photograph, warm grain, soft halation, deep shadows.
Why it works. An analog-photo LoRA at 0.9 with its trigger first, 2:3 at 1k. It added warm grain and halation; the same seed without the LoRA came out cleaner and cooler.
Try this prompt

Pricing

FLUX.2 Klein 9B LoRA API pricing

One image starts at $0.018.

The playground shows the exact price for your settings before you run. Failed or timed-out tasks are usually not charged. Some models charge for content refusals as stated on their model page; check those billing terms before submitting.

See every price tier

Get started

How to use the FLUX.2 Klein 9B LoRA API in three steps

Step 1
Pick LoRAs made for klein 9B
Look for files whose base model is FLUX.2 [klein] 9B or FLUX.2 [klein] Base 9B; in our tests both kinds loaded. FLUX.1 LoRAs and klein 4B LoRAs ran without an error and changed nothing.
Step 2
Trigger phrase first
Most klein LoRAs name a trigger on their model card, such as "Cinematic, Film Still." Start the prompt with it, then describe subject, clothing, place and light in sentences.
Step 3
Start the scale at 0.8 to 1
In our tests 0.5 gave a faint version of a style, 1 gave the full look, and 4 broke the picture into blocks. Move in steps of 0.2 and stop where faces still hold.

Open the playground Get an API key

Parameter reference and code samples are in the API and Readme tabs at the top of this page.

Why SpicyAPI

Why run FLUX.2 Klein 9B LoRA on SpicyAPI

No filter from us
We add no content filter of our own. What the model renders is what you get back.
Tested, not guessed
Content labels come from real generations we ran and checked, with the test date on the page.
Pay per result, in dollars
No subscription and no credits. Failed or timed-out tasks are usually not charged. Some models charge for content refusals as stated on their model page; check those billing terms before submitting.
One key for every model
One API key and balance cover image, video, audio and chat models, so you can explore more models from the same account.

FAQ

FLUX.2 Klein 9B LoRA API FAQ

About FLUX.2 Klein 9B LoRA

FLUX.2 Klein 9B LoRA puts the fast, step-distilled klein 9B behind your own LoRAs: text to image and editing at 1k or 2k, three LoRAs per call, about ten seconds per image and no content filter. Bring LoRAs trained for klein 9B, distilled or Base.