FLUX.1-dev API, Deployment, Pricing

black-forest-labs/FLUX.1-dev

FLUX.1 [dev] is a 12 billion parameter rectified flow transformer capable of generating images from text descriptions. It offers cutting-edge output quality, second only to their state-of-the-art model FLUX.1 [pro]. The model features competitive prompt following, matching the performance of closed source alternatives. Trained using guidance distillation, FLUX.1 [dev] is more efficient. Open weights are provided to drive new scientific research and empower artists to develop innovative workflows

API Usage

cURL

Python

JavaScript

curl --request POST \
  --url https://api.siliconflow.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "model": "black-forest-labs/FLUX.1-dev",
  "prompt": "an island near sea, with seagulls, moon shining over the sea, light house, boats int he background, fish flying over the sea",
  "image_size": "1024x1024",
  "prompt_enhancement": false,
  "num_inference_steps": 20
}'

Details

Model Provider

Black Forest Labs

Type

image

Sub Type

text-to-image

Publish Time

Aug 1, 2024

Price

undefined

/ Image

Tags

MoE,235B,128K

Open in Playround

API Reference

Compare with Other Models

See how this model stacks up against others.

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FLUX1.1 Pro is an enhanced text-to-image model built on the FLUX.1 architecture, offering improved composition, detail, and rendering speed. With better visual consistency and artistic fidelity, it's suitable for illustration, creative content generation, and e-commerce visual assets—delivering diverse styles with strong prompt alignment.

FLUX 1.1 [pro]

FLUX 1.1 [pro] Ultra

FLUX1.1 Pro Ultra is the high-resolution version of FLUX1.1 Pro, capable of generating images up to 4 megapixels (2K resolution). It improves photo realism and prompt controllability for advanced use cases. The Ultra mode is optimized for composition and precision, while Raw mode prioritizes natural textures and realism—ideal for commercial visual production, art direction, and realistic concept rendering.

FLUX 1.1 [pro] Ultra

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FLUX.1 Kontext Max is the most powerful and feature-rich model in the Kontext series, designed for high-resolution, high-precision visual editing and generation. It offers superior prompt adherence, detailed rendering, and advanced typographic control. Ideal for enterprise design systems, marketing visuals, and automated creative pipelines that require robust scene transformations and layout control.

FLUX.1 Kontext [max]

FLUX.1 Kontext [pro]

FLUX.1 Kontext Pro is an advanced image generation and editing model that supports both natural language prompts and reference images. It delivers high semantic understanding, precise local control, and consistent outputs, making it ideal for brand design, product visualization, and narrative illustration. It enables fine-grained edits and context-aware transformations with high fidelity.

FLUX.1 Kontext [pro]