FLUX
AI image models for generation, editing and developer integration
FLUX is Black Forest Labs’ visual model family. FLUX 3 Image combines prompt-based generation, image edits, multiple references and layout controls through a hosted API.
Paid plansAccount required
- Access
- Paid access
- Usage pricing
- USD 0.041 / imageFLUX 3 Image 768sq — list rate
- Available on
- Web, API
What is FLUX?
FLUX is a family of visual AI models from Black Forest Labs. Its current FLUX 3 Image model generates pictures from text, edits supplied images and combines references into a new composition. Hosted access is available through the developer API and browser playground. FLUX.2 remains supported as a separate model family with its own capabilities and deployment options.
The Image model’s layout controls give elements positions as well as descriptions. Bounding boxes can specify where a subject belongs, while image references supply source material. For editing, written instructions and reference images describe changes to the existing scene. These controls guide the generation; a bounding box does not act as a hard clipping mask.
Developers can integrate hosted FLUX models into their applications, or run eligible model weights on their own infrastructure under the relevant licence. Those routes differ in cost, terms and infrastructure requirements. FLUX.2 [klein] 4B is available under Apache 2.0, while the 9B weights have non-commercial terms unless covered by an appropriate commercial licence.
Best for
- Developers adding image generation and edits to an application.
- Creative teams using multiple references and controlled layouts.
- Technical teams evaluating eligible self-hosted image models.
Limitations
API output has a time-limited retrieval URL and must be saved promptly. Costs change with the selected model and output tier. Hosted API terms permit use of inputs and outputs for model improvement; self-hosting licences and commercial rights vary by model.
FLUX features
Text-to-image generation
Send a prompt to FLUX 3 Image and choose an output tier and aspect ratio. The same endpoint supports generation and editing.
Multi-reference composition
Combine up to ten images and describe how their subjects relate. References can supply products, characters or scene elements.
Instruction-based edits
Provide an image and a written change, then continue with further revisions. Multi-reference requests can replace or introduce an object from another image.
Bounding-box layouts
Specify the placement and scale of elements through boxes in the prompt. Editing instructions can keep, move, replace or remove named elements; boxes remain guidance rather than clipping masks.
Resolution tiers
FLUX 3 Image supports tiers from 768sq through 4K. The tier reflects an approximate pixel count, so a wide image has different width and height from a square image in the same tier.
Licensed local deployments
Eligible FLUX.2 weights can run on your infrastructure. Commercial packages vary by model, user count, domain and intended use; API access does not grant general self-hosting rights.
FLUX pricing
Paid plans. Usage-based pricing. Visit FLUX for full plan details and current offers.
Example plans and usage rates; additional charges may apply.
FLUX 3 Image 768sq — list rate
USD 0.041 / image
FLUX 3 Image
Plan details
Per generated image; named resolution tier. Includes prompts and reference images.
FLUX 3 Image 768sq — launch offer
USD 0.0205 / image
FLUX 3 Image
Plan details
50% launch discount: accepted 1 October 2026 15:00 UTC through 8 October 2026 15:00 UTC; list rate afterwards.
FLUX 3 Image 1K — list rate
USD 0.048 / image
FLUX 3 Image
Plan details
Per generated image; named resolution tier. Includes prompts and reference images.
Technical specifications
Image generation
| Feature | FLUX |
|---|---|
| Prompt and reference inputs | FLUX 3 Image accepts text prompts and up to ten reference images; references can be URL or base64 inputs, from 256×256px to 16MP.Named model and deployment route |
| Editing controls | FLUX 3 Image supports written edits, multi-reference composition and bounding-box placement. Boxes guide position and scale; they are not hard clipping masks.Named model and deployment route |
| Output dimensions | FLUX 3 Image has 768sq, 1K, 1.5K, 2K and 4K output tiers. Tiers indicate approximate pixel count, not a fixed width; supported aspect ratios change the delivered dimensions.Named model and deployment route |
| Style and character controls | Reference images can supply subjects, products and styles across compositions. Bounding-box instructions can anchor elements during edits; controls and limits differ in FLUX.2.Named model and deployment route |
| Output licensing and privacy | Hosted API access and self-hosting have separate terms. FLUX.2 [klein] 4B uses Apache 2.0; 9B uses the FLUX Non-Commercial License unless separately licensed for commercial deployment.Named model and deployment route |
| API access | SupportedNamed model and deployment route |
FLUX alternatives
Other image platforms with developer access
Recraft
Proprietary image and SVG models with separate prepaid API pricing.
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Image creation, text-oriented editing and developer access.
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Image generation, live creation and an API for several model families.
Compare with FLUXFLUX FAQs
Is FLUX a subscription app?
Black Forest Labs’ hosted API uses generation-based billing rather than a per-seat subscription. Its browser playground offers a way to access the models, while eligible local deployments follow separate model licences.
Is every FLUX model free for commercial use?
No. Licences differ across the family. FLUX.2 [klein] 4B uses Apache 2.0; the 9B weights use a non-commercial licence unless separately licensed. Hosted API and commercial self-hosting have their own terms.
Does 4K always mean a 4096-pixel-wide FLUX image?
FLUX 3’s 4K tier represents approximately 16 megapixels. Aspect ratio changes the delivered width and height, and dimensions are rounded to multiples of 16 rather than fixed at 4096 pixels wide.
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