FLUX 3 Klein: AI Image Generator Online
Bottom line
FLUX 3 Klein: Black Forest Labs image generation at 1K, 2K or 4K, from 1 credit per image. Pick FLUX 3 Klein in the Text to Image tool, write your prompt, and pay per image in credits — the price is visible before you generate.
FLUX 3 Klein is the lightweight member of Black Forest Labs' FLUX 3 image family. On VdoBloom it generates images from a text prompt at 1K, 2K or 4K, in nine shapes: 1:1, 4:3, 3:4, 3:2, 2:3, 16:9, 9:16, 21:9 and 9:21.
Pricing is per image and depends only on resolution: 1 credit at 1K, 2 at 2K and 5 at 4K. That makes it a low-cost way to explore ideas at 1K and then render the keeper at 4K. Prompts can run to 5,000 characters.
A built-in prompt enhancer is on by default: it expands a short prompt into a fuller scene. Turn it off when your wording is already exact and you want the model to follow it literally. Output comes back as PNG, JPEG or WebP.
What FLUX 3 Klein costs on VdoBloom
One price per image, set by resolution. Text-to-image and editing cost the same.
| Resolution | Credits per image |
|---|---|
| 1K | 1 |
| 2K | 2 |
| 4K | 5 |
When to turn the prompt enhancer off
Leave it on for short prompts: it fills in lighting, setting and detail. Turn it off when you have written a precise description, such as exact colours, text or a layout, so the model does not rewrite it.
What creators use FLUX 3 Klein for
- Quick idea sketches at 1K for 1 credit each, then a 4K render of the best one.
- Wide 21:9 banners and tall 9:21 story images.
- Product and lifestyle stills to animate later with an image-to-video model.
How to use FLUX 3 Klein on VdoBloom
- 1Open the Text to Image tool and select FLUX 3 Klein.
- 2Write your prompt.
- 3Set resolution (1K/2K/4K), aspect ratio, review the credit cost, and generate.
Frequently asked questions
How much does FLUX 3 Klein cost?
1 credit per image at 1K, 2 at 2K and 5 at 4K.
What resolutions and shapes does FLUX 3 Klein support?
1K, 2K and 4K, in 1:1, 4:3, 3:4, 3:2, 2:3, 16:9, 9:16, 21:9 and 9:21.
What does Enhance prompt do?
It rewrites a short prompt into a fuller scene before generating. It is on by default; switch it off for literal instructions.
Who makes FLUX 3 Klein?
Black Forest Labs, the team behind the FLUX models.
FLUX 3 Klein guides, prices and comparisons
This page is the FLUX 3 Klein hub. Each guide below goes deeper on one question and links back here.