Capabilities
Exceptional prompt adherence
Follows complex, multi-element prompts with high accuracy — comparable to DALL-E 3 and Midjourney v6 at launch.
Strong text rendering
Generates clean, legible text within images with improved accuracy over previous open-weight models.
Natural lighting and composition
Produces well-balanced lighting effects, realistic shadows, and visually coherent compositions across diverse subjects.
Fine-tuning foundation
The most popular open-weight base for LoRA fine-tunes — over 36,000 community adapters available on Hugging Face.
Flexible aspect ratios
Supports aspect ratios from 3:7 portrait to 7:3 landscape with resolutions up to 1 megapixel.
Local deployment
Open weights available on Hugging Face for local and on-premise deployment via Diffusers or ComfyUI.
Specifications
| Feature | Details |
|---|---|
| Architecture | Hybrid multimodal and parallel diffusion transformer (rectified flow) |
| Parameters | 12 billion |
| Training method | Guidance distillation from FLUX.1 [pro] |
| Max resolution | ~1 megapixel (default 1024×1024) |
| Aspect ratios | 3:7 to 7:3 (all intermediate ratios supported) |
| Recommended steps | 20–50 |
| Prompt token limit | 512 tokens |
| Released | August 1, 2024 |
How to use
Write your prompt
Write a detailed prompt describing the subject, style, lighting, and composition. Flux Dev responds well to descriptive, structured prompts.
Set your aspect ratio
Choose the aspect ratio that fits your project. Flux Dev supports a wide range from portrait to landscape.
Prompting tips
- Describe lighting explicitly — Terms like “golden hour”, “studio lighting”, “soft diffused light” significantly shape the output.
- Be specific about style — Mention the photographic or artistic style: “cinematic”, “editorial”, “National Geographic-style”, or art movements like “impressionist”, “concept art”.
- Use composition language — “close-up”, “wide shot”, “shallow depth of field”, “bokeh background” guide framing.
- Keep complex scenes structured — For multi-element compositions, describe the primary subject first, then supporting elements, then environment.
Example prompts
A bioluminescent forest at night, glowing mushrooms illuminating the forest floor, misty atmosphere, macro photography style, ethereal blue-green light.
Editorial portrait of a woman in 1970s fashion, warm film grain texture, golden hour lighting, cinematic composition, Kodak portra 400 aesthetic.
Compare models
| Model | Parameters | Max resolution | Best for | License |
|---|---|---|---|---|
| Flux Dev | 12B | ~1MP | Fine-tuning, research, creative work | Non-commercial (open weights) |
| Flux Ultra 1.1 | 12B | 4MP | Print-res commercial output | Proprietary API |
| ImagineArt 1.5 Pro | — | 4K native | Composition-heavy professional work | Commercial |
| Seedream 4.0 | 12B | 4K native | Multi-reference campaigns | Commercial |
Flux Dev’s open weights are hosted on Hugging Face under a non-commercial license. For commercial projects on ImagineArt, all usage is covered under ImagineArt’s platform licensing.