Coming soon on LazyKiwi
FLUX 3 Klein
Black Forest Labs' small open FLUX 3 model: fast generation, edits and multi-reference images on an ordinary graphics card. FLUX 3 Klein is not in LazyKiwi yet; Z-Image, a fast open image model, is ready in the image generator now.
Using it
How to use FLUX 3 Klein
FLUX 3 Klein runs outside LazyKiwi today.
BFL API
Call the distilled model as flux-3-image-klein on the Black Forest Labs API.
Run it locally
Download the base or distilled weights from Hugging Face and run them in ComfyUI or Diffusers; the INT8 build fits 8GB RTX cards.
Need a fast image now?
LazyKiwi's image generator runs Z-Image, Qwen Image and GPT Image 2.5 in the browser with free credits on sign-up.
What it is
What FLUX 3 Klein is built for
Black Forest Labs published "FLUX 3 Image Klein" on October 15, 2026, describing it as "a 5.6B parameter open weights model, leading our blind evaluations for text-to-image, multi-reference generation and image editing." It is the compact member of the FLUX 3 family announced on July 23, 2026.
One model
Generate, edit and combine references
The same model handles text-to-image, image editing and multi-reference generation with up to 10 reference images, plus bounding-box controls for placing elements.
- Text to image and editing
- Up to 10 reference images
- Bounding-box controls
Speed
Fast on a desktop GPU
BFL quotes about 4 seconds for a 1MP image on an RTX 5090 and under 9 seconds on an RTX 4070 with the step-distilled model, and 0.55 seconds for 1024 × 1024 on a GB300.
- Step-distilled variant (16 steps)
- Base model at 50 steps
- Native 4K generation
Hardware
Fits in 8GB of VRAM
Memory needs per BFL: 11.2 GB in BF16, 5.6 GB in FP8, and an INT8 build that "runs on NVIDIA GeForce RTX GPUs with as little as 8GB of VRAM."
- BF16: 11.2 GB
- FP8: 5.6 GB
- INT8: 8GB-class GPUs
License
Free commercial use for smaller companies
Weights are on Hugging Face under the FLUX Kommunity License, which allows free commercial use for companies with annual revenue under $5M, plus research and non-commercial use. The BFL API serves the distilled model as flux-3-image-klein.
- FLUX Kommunity License
- Free commercial use under $5M revenue
- BFL API: flux-3-image-klein
Specs
FLUX 3 Klein specs at a glance
From Black Forest Labs' October 15, 2026 announcement, checked 2026-10-28.
- Developer
- Black Forest Labs
- Official name
- FLUX 3 Image Klein
- Released
- October 15, 2026
- Parameters
- 5.6B (open weights)
- Variants
- Base (50 steps); step-distilled (16 steps)
- Tasks
- Text to image, image editing, multi-reference (up to 10)
- Output
- Native 4K generation
- VRAM
- BF16 11.2 GB · FP8 5.6 GB · INT8 on 8GB GPUs
- API price
- "$0.009 per 1K image" on the BFL API
- License
- FLUX Kommunity License
- Runs in
- BFL API, Hugging Face, ComfyUI, Diffusers, TensorRT-LLM, SGLang, vLLM-Omni
- In LazyKiwi
- Coming soon; Z-Image is available now
Versions
FLUX 3 Klein vs FLUX.2 klein vs Z-Image
FLUX 3 Klein is the FLUX 3 successor to FLUX.2 klein as BFL's small open model; Z-Image is the closest model you can run in LazyKiwi today.
| Model | Size | What it is for | Where |
|---|---|---|---|
| FLUX 3 Klein | 5.6B, open weights | Fast generation, edits and multi-reference on a desktop GPU | Coming soon |
| FLUX.2 klein | Distilled FLUX.2 | Previous small FLUX model (see the FLUX.2 page) | BFL and partners |
| Z-Image | 6B, open weights | Fast photoreal text-to-image in the browser | LazyKiwi image generator |
| Qwen Image | Open model | In-image text and single-image edits | LazyKiwi image generator |
FAQ
FLUX 3 Klein FAQ
What is FLUX 3 Klein?
FLUX 3 Image Klein is a 5.6B-parameter open-weight image model from Black Forest Labs, released on October 15, 2026. It does text-to-image, image editing and multi-reference generation.
When was FLUX 3 Klein released?
Black Forest Labs announced it on October 15, 2026, three months after the FLUX 3 family (July 23, 2026).
How much VRAM does FLUX 3 Klein need?
Per BFL: 11.2 GB in BF16, 5.6 GB in FP8, and an INT8 build that runs on GeForce RTX GPUs with as little as 8GB of VRAM.
Is FLUX 3 Klein free for commercial use?
Under the FLUX Kommunity License, commercial use is free for companies with annual revenue under $5M; research and non-commercial use are also allowed. Larger companies should check BFL's licensing terms.
How many reference images does FLUX 3 Klein take?
Up to 10 reference images in one request.
Is FLUX 3 Klein the same as FLUX.2 klein?
No. FLUX.2 klein is the distilled member of the FLUX.2 family (2025); FLUX 3 Image Klein is the October 2026 model in the FLUX 3 family.
Can I use FLUX 3 Klein in LazyKiwi?
Not yet. It is coming soon; Z-Image, Qwen Image and GPT Image 2.5 are available in the image generator today.
Generate fast images today
FLUX 3 Klein is coming soon to LazyKiwi. Z-Image is ready now in the same workbench, with free credits on sign-up.
More models
Image models you can run in LazyKiwi today, and the earlier FLUX line.