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Black Forest Labs has quickly made a name for itself as the first high-quality open source AI image generation startup, surpassing even the quality of the models offered by Stability AI, where the founders of Black Forest Labs previously worked. It also briefly served as the default image generator in xAI’s Grok language model.
Today, Black Forest Labs goes even further, announcing the release of FLUX Pro fine-tuning APIa tool that allows creators to customize generative AI models using their own images and concepts.
Designed for professionals in marketing, branding, storytelling and other creative industries, the API allows personalization of the company’s flagship product. FLUXPro and FLUX Ultra with a user-friendly approach.
Personalization at scale
The FLUX Pro Finetuning API allows users to fine-tune generative text-to-image conversion models with five to 20 training images, optionally accompanied by textual descriptions.
This process results in custom templates that retain the generative versatility of the base FLUX Pro templates while aligning results to specific creative visions. The tool supports multiple modes, including “persona,” “product,” “style,” and “general,” making it adaptable to a wide variety of use cases.
Trained models can seamlessly integrate with endpoints such as FLUX.1 Fill, Depth, Canny, and Redux, as well as high-resolution generation capabilities of up to four megapixels. Whether creating brand-consistent marketing visuals or detailed character illustrations, the API improves the accuracy and adaptability of AI-generated content.
Practical applications and use cases for brands, marketers and more
Using the FLUX Pro Finetuning API, professionals can create custom templates that preserve essential design elements, character consistency, or brand properties. A study conducted by Black Forest Labs showed that 68.9% of users preferred FLUX Pro’s accurate results over competing services.
Some highlighted applications include:
• Paint : Using FLUX.1 Fill for iterative edits to refine images
• Structural control: Integration with FLUX.1 Depth to improve image generation with precise structural adjustments
• Visual branding: Ensure consistency of marketing materials and campaigns
Partnership with BurdaVerlag
Black Forest Labs has partnered with Burda Verlaga leading German media and entertainment company, to demonstrate the potential of the FLUX Pro Finetuning API. BurdaVerlag’s creative teams use the tool to develop custom FLUX templates tailored to their brands, such as the children’s publication Lissy PONY.
Through this integration, BurdaVerlag design teams can create visuals that reflect each brand’s identity while exploring new creative directions. The API accelerated their workflows, enabling the generation of high-quality content at scale.
Accessible prices and availability
The FLUX Pro Finetuning API is now available through API endpoints via Flux.1. [dev] model. Pricing for all FLUX models on the Black Forest Labs API is as follows:
• FLOW 1.1 [pro] Ultra: $0.06 per image
• FLOW 1.1 [pro]: $0.04 per image
• FLOW.1 [pro]: $0.05 per image
• FLOW.1 [dev]: $0.025 per image
Getting started is child’s play
The fine-tuning process requires minimal user input. Training images in supported formats (JPG, JPEG, PNG or WebP) are uploaded, with resolutions limited to one megapixel for optimal results. Advanced configuration options allow precise control of the training process, including the number of iterations, learning rates and trigger words for fast and accurate onboarding.
Black Forest Labs has also provided many resources, including a Fine Tuning Beta Guide and Python scripts for easy implementation. Users can monitor progress, adjust settings, and test results directly through API endpoints, ensuring a smooth and efficient workflow.
By combining versatility, ease of use, and professional-quality results, the FLUX Pro Finetuning API sets a new benchmark for creating personalized content in generative AI. With this tool now available, Black Forest Labs aims to transform the way individuals and organizations approach personalized media generation, unlocking creative possibilities on an unprecedented scale.
