# Flux2 Klein AI FAQ

## What is Flux 2 klein?

Per the site, Flux 2 klein is a fast AI image generation model from Black Forest Labs designed for sub-second inference, offered on this site in 4B and 9B variants.

## What is the difference between the 4B and 9B variants?

The site describes 9B as the flagship quality tier and 4B as the faster, open-source Apache 2.0 variant that can run on consumer GPUs.

## Does it support image editing?

Yes. The model combines text-to-image generation and image editing in a single architecture.

## How many credits does generation cost?

Per the site FAQ: 4B text-to-image costs 2 credits, 9B text-to-image costs 4 credits, 4B edit costs 4 credits, and 9B edit costs 6 credits.

## Can outputs be used commercially?

The site notes the 4B model is released under Apache 2.0, which permits commercial use subject to the license; site terms also apply.

## Is this site affiliated with Black Forest Labs?

No. The site states it operates independently; "klein" is a trademark of Black Forest Labs.

Source: https://flux2klein.ai