---
title: "Black Forest Labs releases FLUX 3 Image Klein, a 5.6-billion-parameter open image model that runs on 8 GB graphics cards"
url: https://anawords.com/story/black-forest-labs-flux-3-image-klein-open-weights
published: 2026-10-16T13:57:48+05:30
updated: 2026-10-16T13:57:48+05:30
section: Tools & Apps
author: Mayank Sahu
checked: sources checked by AI, approved by editor
version: 1
---

# Black Forest Labs releases FLUX 3 Image Klein, a 5.6-billion-parameter open image model that runs on 8 GB graphics cards

The model generates and edits images from text and up to 10 reference pictures. It is free for commercial use by individuals and companies with under $5 million in annual revenue.

**In short:** Black Forest Labs released FLUX 3 Image Klein on 15 October 2026, a 5.6-billion-parameter open-weight model for text-to-image generation and editing. The company says a compressed version makes a 1-megapixel image in about 4 seconds on an RTX 5090 and runs on GPUs with 8 GB of memory.

## What was released

Black Forest Labs, the German company behind the FLUX image models, released FLUX 3 Image Klein on 15 October 2026.[^1] It is a 5.6-billion-parameter model for text-to-image generation, image editing and generation from up to 10 reference images.[^1][^2]

Two versions are on Hugging Face: a base model meant for fine-tuning and a faster distilled model.[^1][^2] The company also offers it through its API, with prices that it says start at $0.009.[^1]

## Who can use it for free

The FLUX Kommunity License allows free commercial use for individuals and companies with less than $5 million in annual revenue, plus research and non-commercial use.[^1][^2] Larger organisations need a self-hosted licence or the API.[^1] The model card notes that this does not give blanket permission to sell fine-tuned versions.[^2]

## Speed and hardware

Black Forest Labs says:[^1]

- The distilled model in INT8 makes a 1-megapixel image in about 4 seconds on an Nvidia RTX 5090 and under 9 seconds on an RTX 4070.
- The INT8 version runs on GPUs with as little as 8 GB of memory.
- On Nvidia’s GB300, the NVFP4 version takes under 0.6 seconds.

The model card advises always using a prompt upsampler, because short prompts give generic results.[^2]

## How it compares

In the company’s own evaluations, Klein ranks first among open models for text-to-image, multi-reference generation and editing, ahead of larger models such as Qwen-Image 2.1.[^1] It scored 91 Elo points above the previous FLUX.2 Klein 9B model in text-to-image.[^1] These are Black Forest Labs’ results; we found no independent tests yet.

## Tools that support it

ComfyUI, Hugging Face Diffusers, TensorRT-LLM, SGLang Diffusion and vLLM-Omni supported it on day one.[^1]

## Fact ledger

- [Confirmed] FLUX 3 Image Klein is a 5.6-billion-parameter open-weight image model released on 15 October 2026. (source 1,2)
- [Confirmed] It is free for commercial use by those with under $5 million in annual revenue. (source 1,2)
- [Company claim] A 1-megapixel image takes about 4 seconds on an RTX 5090. (source 1)
- [Company claim] It ranks first among open image models in the company’s evaluations. (source 1)
- [Not known] Independent quality tests.

## Sources

1. [Black Forest Labs: FLUX 3 Image Klein](https://bfl.ai/blog/flux-3-image-klein) — official
2. [Hugging Face: black-forest-labs/flux-3-image-klein](https://huggingface.co/black-forest-labs/flux-3-image-klein) — official