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AI Porn Generators · Editorial review

Black Forest Labs review: FLUX API pricing and free weights

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Black Forest Labs, a German company based in Freiburg, builds the FLUX image and video models. Its API starts at $0.014 per image, and two Apache 2.0 models can be run on your own hardware for free.

ImagesVideoAPIOpen weightsSelf-hostable

Our verdict on Black Forest Labs

Black Forest Labs suits a webmaster who can run FLUX.2 klein 4B on their own GPU with no license fee, or who would rather pay per image through the API. Any other FLUX model on a monetized site needs a license.

Black Forest Labs home page presenting the FLUX model family
Black Forest Labs

Which FLUX licenses allow a paid site

FLUX.2 klein 4B and FLUX.1 schnell are released under Apache 2.0, so they can be used commercially with no fee and no request. Klein 4B runs in about 13 GB of VRAM, on an RTX 3090 or 4070.

FLUX.2 dev and klein 9B fall under a strict non-commercial license, which only applies as long as you receive no direct or indirect payment from using the model. A site earning from ads or affiliate links falls outside it. The self-hosted commercial license, in four tiers with no published price, requires content filtering or a review of outputs before release.

What the Black Forest Labs usage policy bans

The usage policy bans realistic sexual depictions of real people without verified consent, and any removal of C2PA credentials or watermarks from generated images.

FLUX API pricing per image

The API runs on prepaid credits bought by card through Stripe, at the same price as the online playground. A one-megapixel image starts at $0.014 with klein 4B, $0.03 with FLUX.2 pro and $0.07 with FLUX.2 max, and each extra megapixel adds to the bill. FLUX 3 video is billed per second, from $0.17 in HD to $0.80 in UHD.

Black Forest Labs strengths and limitations

Strengths

  • Two Apache 2.0 models, free for commercial use.
  • A full German imprint, register and directors named.
  • Published per-image pricing from $0.014.

Limitations

  • An API that moderates sexual content.
  • No price for the commercial license.
  • A non-commercial license that excludes monetized sites.

Black Forest Labs versus Arli AI

Arli AI rents access to 86 image models, mostly anime-styled, on a flat monthly plan from $10. Black Forest Labs sells its own models, per image through the API or as open weights.

Arli AI

Arli AI rents access to open text and image models with no token or request cap, from $10 to $160 a month.

Read the review Arli AI →Civitai Red

Since April 2026, Civitai Red has been the Civitai domain that carries all adult content and takes crypto.

Read the review Civitai Red →CompliantPix

CompliantPix, run by the Dutch company AIA Digital, sells ready-made AI adult image sets, ten per profile, to fill dating sites, chat platforms and white-label products.

Read the review CompliantPix →DreamGen

DreamGen is a Swiss web app for writing stories and roleplay with AI, with no bans beyond illegal content and minors. Users own what they generate.

Read the review DreamGen →
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