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Black Forest LabsFLUX 3 familyCurrentImage generationReleased 15 Oct 2026

FLUX 3 Image Klein

Small open-weights FLUX 3 model for local generation and editing.

Model idflux-3-image-klein

Price$0.009 per image

Checked16 October 2026

Where it stands

No newer image generation model in our registry yet.

All image generation models

Before it from Black Forest Labs
FLUX.2 [klein] (4B / 9B)14 Jan 2026
Weights
Weights are public. Licence: FLUX Kommunity License v1.0. See the licence for commercial terms.

How to call it

3 ways to use FLUX 3 Image Klein, with the model id each provider expects.

Providers, model ids, endpoints and docs for FLUX 3 Image Klein
ProviderModel idEndpointDocs
BFL API flux-3-image-klein docs.bfl.ai
Hugging Face huggingface.co
GitHub (reference code) github.com

Pricing

Prices for FLUX 3 Image Klein
Per image$0.009

As published: “per 1K image ($0.008 at 768², $0.011 at 1.5K, $0.014 at 2K, $0.036 at 4K; generation and editing priced the same)”.

Source: docs.bfl.ai, checked 16 October 2026.

Specs

Input
Text and images
Output
Images
Context window
Not published
Max output
Not published
Open weights
Yes
Licence
FLUX Kommunity License v1.0 (free commercial use under US$5M annual revenue)
Released
15 October 2026
Status
Current
Type
Image generation

What stands out

What its maker marketed at launch, and what people found later, each with its source.

  • Open-weights 4K generation with bounding boxes

    5.6B model with FLUX 3 Image’s native 4K output and 0–1000-grid bounding boxes to place, move, recolor, replace or remove elements; up to 10 reference images.

    Source: bfl.ai

  • Consumer-GPU builds

    Distilled INT8 build runs on 8 GB VRAM; ~4 s per 1 MP on an RTX 5090, under 9 s on an RTX 4070 (BFL figures, ComfyUI).

    Source: bfl.ai

Notes

Base (50 steps, guidance 3.5) and distilled (16 steps) checkpoints; FP8/INT8/NVFP4. Needs the 9B prompt upsampler flux-3-image-klein-pup per the model card. Text encoder Qwen3-VL-4B-Instruct. HF access gated. Quality claims are BFL’s internal Elo tests.

Local: diffusers with black-forest-labs/flux-3-image-klein (accept the gate on Hugging Face first) and the prompt upsampler.

Sources: https://bfl.ai/blog/flux-3-image-klein , https://huggingface.co/black-forest-labs/flux-3-image-klein , https://docs.bfl.ai/quick_start/pricing