FLUX-DEV
A 12 billion parameter rectified flow transformer capable of generating images from text descriptions
Official Partner
Avg Run Time: 10.000s
Model Slug: flux-dev
Playground
Input
Enter a URL or choose a file from your computer.
Click to upload or drag and drop
image/jpeg, image/png, image/jpg, image/webp (Max 50MB)
Output
Example Result
Preview and download your result.
API & SDK
Create a Prediction
Send a POST request to create a new prediction. This will return a prediction ID that you'll use to check the result. The request should include your model inputs and API key.
Get Prediction Result
Poll the prediction endpoint with the prediction ID until the result is ready. The API uses long-polling, so you'll need to repeatedly check until you receive a success status.
Readme
Overview
flux-dev — Text to Image AI Model
flux-dev from Black Forest Labs delivers exceptional text-to-image generation as part of the pioneering FLUX family, excelling in high-fidelity photorealistic outputs and precise prompt adherence for developers and creators seeking Black Forest Labs text-to-image capabilities. This 12 billion parameter rectified flow transformer stands out for local development workflows, supporting up to 6 multi-reference images to maintain character consistency and style transfer in complex compositions. Ideal for users searching for a flux-dev API or advanced text-to-image AI model, flux-dev enables detailed image creation from structured text prompts, including HEX color codes and pose guidance, at resolutions up to 4MP.
Technical Specifications
What Sets flux-dev Apart
flux-dev differentiates itself in the competitive text-to-image landscape through its specialized role in local development, recommending a maximum of 6 input reference images for superior character consistency and style transfer compared to production models like FLUX.2 pro or max. This capability allows developers to iterate rapidly on custom pipelines without cloud dependencies, enabling fine-tuning for niche applications like research or personalized image editing APIs.
Unlike generic generators, flux-dev supports any aspect ratio with input resolutions starting at 64x64 and outputs up to 4MP, paired with advanced controls such as structured JSON prompting and HEX color matching for precise visual fidelity. Users benefit from photorealistic results that preserve small details, making it perfect for high-volume local testing of text-to-image AI model integrations.
- Unified generation and editing architecture: Handles both text-to-image and multi-reference edits in one model, streamlining workflows for developers building flux-dev API endpoints.
- Rectified flow transformer efficiency: 12B parameters optimized for local inference on high-end GPUs (24GB+ VRAM recommended), balancing quality and control without sub-second speed trade-offs.
- Typography and detail preservation: Excels in rendering legible text and fine elements, outperforming many peers in structured prompting scenarios.
Key Considerations
License Restrictions: FLUX.1 [dev] is released under a non-commercial license, permitting use for personal, scientific, and certain commercial purposes as outlined in the license agreement.
Ethical Use: The model and its derivatives must not be used in ways that violate laws, exploit or harm minors, disseminate false information, or engage in activities that harass or bully individuals or groups.
Complete necessary data preprocessing steps: Ensure that input data is appropriately prepared before using the model.
Legal Information
By using this model, you agree to:
- Black Forest Labs API agreement
- Black Forest Labs Terms of Service
Tips & Tricks
How to Use flux-dev on Eachlabs
Access flux-dev seamlessly through Eachlabs Playground for instant text-to-image testing with prompts, up to 6 reference images, HEX colors, and resolution settings up to 4MP. Integrate via the flux-dev API or SDK for production apps, delivering photorealistic PNG/JPG outputs with structured JSON controls—perfect for developers scaling Black Forest Labs text-to-image generation.
---Capabilities
High-Quality Image Generation: FLUX.1 [dev] produces cutting-edge output quality, closely matching the performance of state-of-the-art models like FLUX.1 [pro].
Open Weights for Research: The availability of open weights encourages new scientific research and the development of innovative artistic workflows.
Training with Guidance Distillation: Improved efficiency through guided training methodologies.
What Can I Use It For?
Use Cases for flux-dev
Developers fine-tuning local AI image pipelines: Researchers can load flux-dev weights for custom training on proprietary datasets, using multi-reference inputs like "integrate character from reference1.jpg with style from reference2.jpg in a cyberpunk cityscape" to achieve consistent outputs for game asset generation, bypassing commercial API limits.
Product designers prototyping visuals: Feed HEX codes and pose guidance prompts such as "a sleek electric car in matte #2E8B57 green, dynamic side angle on rainy urban street" to generate 4MP mockups with exact color matching, accelerating e-commerce Black Forest Labs text-to-image workflows without stock photo libraries.
Marketers creating campaign variants: Leverage up to 6 references for A/B testing ad creatives, ensuring brand consistency across compositions—ideal for teams needing a robust text-to-image AI model for scalable, high-detail social media assets.
Content creators experimenting with edits: Artists use flux-dev's local setup to blend styles from multiple inputs, producing unique illustrations for digital art platforms with superior text rendering in labels and signage.
Things to Be Aware Of
Experiment with Diverse Prompts: Test the model's versatility by inputting a wide range of text descriptions to observe the variety and quality of generated images.
Specific Examples: Experiment with diverse text descriptions to generate varied images.
Practical Use Cases: Test the model in real-world applications.
Parameter Tweaks: Optimize output by exploring different parameter settings.
Expected Output Examples: Preview the types of images the model can create.
Advanced Scenarios: Leverage advanced features for specialized tasks.
Creative Applications: Push the boundaries of art and creativity using the model.
Tool Integration: Combine the model with other tools for enhanced functionality.
Limitations
Prompt Sensitivity: The model's output quality and relevance are highly dependent on the input prompts, and it may not always generate images that perfectly match the descriptions.
Bias Amplification: As a statistical model, FLUX.1 [dev] may inadvertently amplify existing societal biases present in the training data.
Output Format: PNG, JPG, WEBP
Pricing
Pricing Detail
This model runs at a cost of $0.025 per execution.
Pricing Type: Fixed
The cost remains the same regardless of which model you use or how long it runs. There are no variables affecting the price. It is a set, fixed amount per run, as the name suggests. This makes budgeting simple and predictable because you pay the same fee every time you execute the model.
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