FLUX
Black Forest LabsFLUX is Black Forest Labs' family of rectified-flow transformer models for text-to-image generation and image editing. The open-weight releases span FLUX.1 [dev] and [schnell] with their Kontext, Krea, Fill, Redux, Depth and Canny variants, the 32B FLUX.2 [dev], and the smaller FLUX.2 [klein] models that run on consumer GPUs. The strongest tiers, FLUX.2 [pro], [flex] and [max], are served only through the vendor's API.
Scored on the downloadable [dev], [schnell] and [klein] weights; the API-only [pro], [flex] and [max] tiers are not part of the reading. FLUX 3 Video is a hosted model, and the downloadable FLUX 3 Action is a robotics world-action model outside this entry.
Openness
2 high confidence- weights
- open(fourteen downloadable image checkpoints across FLUX.1 and FLUX.2
- data
- closed(the model cards describe filtering of the pre-training data and release none of it)
- code
- partial(the flux and flux2 repositories carry minimal inference code
- license
- FLUX-Non-Commercial-License-2.1(the most restrictive license among the distributed checkpoints: FLUX.2 [dev] and the [klein] 9B models, alongside FLUX [dev] Non-Commercial License v2.0 and the FLUX.1 [dev] Non-Commercial License v1.1.1
FLUX.1 [dev], FLUX.2 [dev] and the 9B [klein] models may not be used commercially without a paid license from Black Forest Labs, while [schnell] and the [klein] 4B models are Apache 2.0. Only inference code is published and the training data is not released. FLUX-Non-Commercial-License-2.1 does not permit commercial use, so the license tier is commercial_forbidden.
- https://cdn.jsdelivr.net/gh/black-forest-labs/flux@main/model_licenses/LICENSE-FLUX1-dev recorded 2026-09-26
License body titled "FLUX.1 [dev] Non-Commercial License v1.1.1", covering FLUX.1 [dev], Fill, Depth, Canny, Redux and Kontext [dev].
- https://cdn.jsdelivr.net/gh/black-forest-labs/flux@main/model_licenses/LICENSE-FLUX1-schnell recorded 2026-09-26
FLUX.1 [schnell] license body: "Apache License Version 2.0, January 2004".
- https://cdn.jsdelivr.net/gh/black-forest-labs/flux2@main/model_cards/FLUX.2-dev.md recorded 2026-09-26
FLUX.2 [dev] card: "We filtered pre-training data for multiple categories of “not safe for work” (NSFW) and known child sexual abuse material (CSAM)"; no dataset is released.
- https://cdn.jsdelivr.net/gh/black-forest-labs/flux2@main/model_licenses/LICENSE-FLUX-DEV recorded 2026-09-26
"FLUX [dev] Non-Commercial License v2.0": "use (a) for revenue-generating activity, (b) in direct interactions with or that has impact on end users, or (c) to train, fine tune, or distill other models for commercial use, in each case, is not a Non-Commercial Purpose."
- https://cdn.jsdelivr.net/gh/black-forest-labs/flux2@main/model_licenses/LICENSE-FLUX-NON-COMMERICAL recorded 2026-09-26
License body titled "FLUX Non-Commercial License v2.1"; "Please see https://bfl.ai/licensing if you would like a commercial license."
- https://cdn.jsdelivr.net/gh/black-forest-labs/flux2@main/README.md recorded 2026-09-26
README: "This repo contains minimal inference code to run image generation & editing with our FLUX.2 open-weight models."; its table links the [klein] 4B models to Apache 2.0 and the 9B models to the FLUX Non-Commercial License.
- https://huggingface.co/api/models?author=black-forest-labs&sort=downloads&direction=-1&limit=100 recorded 2026-09-26
Hugging Face listing of the black-forest-labs organization: the FLUX.1 and FLUX.2 checkpoints are public repositories, the [dev]-licensed ones with gated "auto".
- https://huggingface.co/api/models/black-forest-labs/FLUX.2-dev?expand[]=downloads&expand[]=likes&expand[]=cardData&expand[]=gated&expand[]=lastModified&expand[]=createdAt recorded 2026-09-26
Hugging Face API record for FLUX.2-dev: gated "auto", license_name flux-non-commercial-license.
Adoption
4 high confidenceAdoption is measured as Hugging Face downloads summed across the fourteen FLUX.1 and FLUX.2 base checkpoints, led by FLUX.1 [dev]. Quantized and LoRA repositories are left out.
- https://huggingface.co/api/models?author=black-forest-labs&sort=downloads&direction=-1&limit=100 recorded 2026-09-26
Organization listing sorted by downloads: FLUX.1-dev 692264, FLUX.1-schnell 524812, FLUX.2-dev 406993, FLUX.2-klein-4B 404007 and ten more checkpoints in the trailing 30 days.
Capability
3 medium confidenceFLUX.2 [dev] places in the upper half of the text-to-image arena and among the strongest open-weight image models, a step below Qwen-Image-2.1, which leads the open models there. The vendor's better-placed FLUX.2 tiers are API-only and are not counted.
- https://artificialanalysis.ai/image/leaderboard/text-to-image recorded 2026-09-26
Arena leaderboard entries "FLUX.2 [dev]" (rank 41, Elo 1000.0, open weights at huggingface.co/black-forest-labs/FLUX.2-dev) and "FLUX.2 [flex]" (rank 23, no open weights).
Verified 2026-09-26