FLUX.2 Klein 4B

Black Forest Labs

Sub-second image generation on consumer GPUs. Unified text-to-image and image editing in one checkpoint. Apache 2.0 licensed for commercial use. Best open fast image model.

Image Generation Local Latest FLUX Family v2
Documentation Back to Models
Type
Image
generation
Source
Local
local
Input Price
-
per 1M tokens
License
Apache 2.0
license

FLUX Family Timeline 7 versions

FLUX.2 Klein 4B Current Latest local
Jan 2026
FLUX.2 Klein 9B local
Jan 2026
FLUX.2 Dev 32B local
Nov 2025
FLUX.1 Kontext Dev Latest api
May 2025
FLUX.1 Kontext Pro api
May 2025
FLUX.1 Kontext Max api
May 2025
FLUX 1.1 Pro api
-

Local Model Specs

Architecture
Rectified Flow Transformer
Runtime
ComfyUI / diffusers
VRAM Usage
13 GB
Disk Size
8 GB

Details

Release Date
January 15, 2026
Knowledge Cutoff
-
Source
Local
License
Apache 2.0
Model ID
flux2-klein-4b
Last updated: March 13, 2026