Klein
8 modes on this page
Klein turns a text prompt into an image. Pick a mode, write the prompt, run it in the studio.
Input
FormMode
Prompt*
Image Size
Number of Images
Result
Preview
Generated with Klein
Credits·~10s
What Klein is for
Klein from Black Forest Labs is a text-to-image model. You describe the frame and it returns a still image in about 10 seconds, billed at Credits. This page groups 8 modes (9B Text to Image, 9B Image Edit, 4B Text to Image, 4B Image Edit, 9B Base Image Edit, 4B Base Image Edit, 9B Base Text to Image, and 4B Base Text to Image) so you are not hunting separate URLs for the same family.
Klein is cheap enough that a generation usually fits the free Knowlify plan's credits. A typical run is about 10 seconds.
Pick Klein for text to image at Credits and ~10s. Compare it with Flex, Flux, Flux 1 on the related cards below if you need a different look, speed, or input type.
How to use Klein
- 1. Write a still prompt for Klein. Be specific about subject, style, and lens.
- 2. Run it. The prompt opens in the Knowlify studio, where Klein generates.
- 3. Stay in the studio to turn a document or a longer prompt into a narrated video.
What you need
- A prompt that names the subject, style, and framing.
- Image Size (square_hd, square, portrait_4_3, portrait_16_9, and more).
Example prompt
a robot hand holding a ripe peach, studio, black background, photoreal photograph, 85mm, natural light, no text, no watermark, no logo, no UI
Frequently asked questions
How do I run Klein?
Run Klein on Knowlify at /generate/klein. This page has 8 modes in one dropdown. Write the prompt on this page and it opens in the studio, where Klein generates a still image. The same studio also turns documents into full narrated videos.
Where can I use Klein online?
On Knowlify (Black Forest Labs's model, knowlify.com/generate/klein). You do not need a separate playground. Klein runs in the studio next to document-to-video.
Can I make a longer video with Klein?
Klein itself produces a still image. On Knowlify you can take that output, or skip it and upload a document, and generate a full narrated video with a script you can edit.
What do I need to run Klein?
A text prompt is enough. Klein generates the image from that description in the studio.
How long does Klein take?
Plan on about 10 seconds for a typical run, then whatever queue time the studio has. Video models sit at the high end of that range.
Does Klein have more than one mode?
Yes. This page has 8 modes: 9B Text to Image, 9B Image Edit, 4B Text to Image, 4B Image Edit, 9B Base Image Edit, 4B Base Image Edit, 9B Base Text to Image, and 4B Base Text to Image. Switch them in the Mode dropdown instead of opening a new URL.
What does FLUX.2 [klein] 9B cost?
Knowlify charges this as credits, at the compute cost.
What is FLUX.2 [klein] 9B best for?
Text-to-image generation with FLUX.2 [klein] 9B from Black Forest Labs. Enhanced realism, crisper text generation, and native editing capabilities. It turns a text prompt into an image.
Do I need an account to use FLUX.2 [klein] 9B?
A free Knowlify account, yes. This page composes the prompt; the studio is where FLUX.2 [klein] 9B actually runs.