# FLUX 3 Image Klein license

> Updated 2026-10-16 · https://imageklein.com/flux-3-image-klein-license

FLUX 3 Image Klein is released under the FLUX Kommunity License v1.0: research and non-commercial use are free, and individuals and companies with less than US$5 million in gross annualized revenue (including affiliates) may use it commercially for free. Bigger organizations use the BFL API or buy a self-hosting license.

## Who can use it for free?

| You are… | Self-host the weights | BFL API |
|---|---|---|
| Researcher, hobbyist, non-commercial | Free | Paid per image |
| Individual or company under $5M revenue | Free, including commercial output | Paid per image |
| Company at or above $5M revenue | Needs a commercial self-hosting license | Allowed, paid per image |

The revenue test counts affiliates. BFL hasn't published a standard price for self-hosting licenses — [contact BFL](https://bfl.ai/licensing).

## What the license forbids

- Military use and surveillance, including related R&D; biometric processing.
- Unlawful, fraudulent, defamatory or abusive use; CSAM and non-consensual intimate images.
- Violating third-party rights, including publicity and digital-replica rights (don't fake real people).
- Using the model, its derivatives or its outputs to improve another AI model with a similar function.
- Breaking export controls and sanctions.

The commercial exception covers generating outputs; it is not blanket permission to commercially distribute fine-tuned weights. The “FLUX” and “Black Forest Labs” names need BFL's written permission beyond descriptive references.

## Other parts

The text encoder, Qwen3-VL-4B-Instruct, is Apache-2.0. Earlier, FLUX.2 [klein] 4B was Apache-2.0 and FLUX.2 [klein] 9B was non-commercial only — FLUX 3 Image Klein sits in between.
This is a plain-English summary, not legal advice. The license text on the Hugging Face repo is what applies.

## FAQ

**Can I sell images made with FLUX 3 Image Klein?**
Yes if you're an individual or your company (with affiliates) makes under $5 million a year, under the FLUX Kommunity License. Larger companies can sell outputs made through the paid API or under a commercial self-hosting license.

**Is FLUX 3 Image Klein open source?**
It's open weights, not OSI open source: the weights are downloadable, but the FLUX Kommunity License limits free commercial use to organizations under $5M revenue and bans certain uses.

**What license is FLUX 3 Image Klein under?**
The FLUX Kommunity License v1.0. The bundled Qwen3-VL-4B-Instruct text encoder is Apache-2.0.


## Sources

- [Hugging Face — black-forest-labs/flux-3-image-klein (model card)](https://huggingface.co/black-forest-labs/flux-3-image-klein)
- [Black Forest Labs — FLUX 3 Image Klein (blog, Oct 15, 2026)](https://bfl.ai/blog/flux-3-image-klein)
- [Black Forest Labs — licensing](https://bfl.ai/licensing)
- [VentureBeat — FLUX 3 Image Klein weights, free commercial use for smaller businesses](https://venturebeat.com/technology/black-forest-labs-opens-flux-3-image-klein-weights-with-free-commercial-use-limited-to-smaller-businesses)
- [Press release via GlobeNewswire (Oct 15, 2026)](https://www.globenewswire.com/news-release/2026/10/15/3381905/0/en/black-forest-labs-expands-access-to-frontier-visual-intelligence-with-open-weights-release-of-flux-3-image-klein.html)