Black Forest Labs enables fine-tuning of the Flux AI image generator

Black Forest Labs has quickly made a name for itself as the first, high-quality, open source AI image creation startup – even surpassing… Quality models provided by Stability AI, Where the founders of Black Forest Labs previously worked. It served as the default image generator in xAI’s Grok language model as well.

Today Black Forest Labs takes this a step further, Release announcement to FLUX Pro Finetuning APIa tool that enables creators to customize generative AI models using their own images and concepts.

Designed specifically for professionals in marketing, branding, storytelling and other creative industries, the API enables customization of the company’s flagship FLUX Pro and FLUX Ultra models with an easy-to-use approach.

Customization at scale

The FLUX Pro Finetuning API allows users to fine-tune text-to-image models using between 5 and 20 training images, optionally accompanied by text descriptions.

This process results in custom models that maintain the generative diversity of the basic FLUX Pro models while aligning the output to specific creative visions. The tool supports multiple modes, including Personal, Product, Style, and General, making it adaptable to a wide range of use cases.

The trained models can seamlessly integrate with endpoints such as FLUX.1fill, Depth, Canny, and Redux, as well as high-resolution generation capabilities up to four megapixels. Whether it’s creating brand-consistent marketing visuals or detailed character art, an API improves accuracy and adaptability in 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 characteristics. A study by Black Forest Labs showed that 68.9% of users prefer FLUX Pro’s improved results over competing services.

Some featured apps include:

• In drawing: Use FLUX.1 Fill for iterative edits to enhance images

• Structural control: Integration with FLUX.1 Depth to enhance image generation through fine structural adjustments

• Visual branding: Ensure consistency across marketing materials and campaigns

Partnership with BurdaVerlag

Black Forest Labs has partnered with Borda Verlaga leading German media and entertainment company, came to demonstrate the capabilities of the FLUX Pro Finetuning API. BurdaVerlag’s creative teams use the tool to develop custom FLUX templates that fit their brands, such as children’s publications Lacey Bonnie.

Through this integration, BurdaVerlag’s design teams can create images that reflect each brand’s identity while exploring new creative directions. The API has accelerated production workflows, making it possible to create high-quality content at scale.

Pricing and availability are accessible

The FLUX Pro Finetuning API is now available via API endpoints through Flux.1 [dev] model. Prices for all FLUX models on the Black Forest Labs API are as follows:

• Flux 1.1 [pro] Ultra: $0.06 per image

• Flux 1.1 [pro]: $0.04 per image

• Flow.1 [pro]: $0.05 per image

• Flow.1 [dev]: $0.025 per image

Getting started is easy

The tuning process requires minimal input from users. Training images are uploaded in supported formats (JPG, JPEG, PNG, or WebP) at up to 1MP resolution for best results. Advanced configuration options allow fine-grained control of the training process, including number of iterations, learning rates and trigger words for fast, accurate integration.

Black Forest Labs has also provided extensive resources, including Beta fine-tuning guide And Python scripts for ease of implementation. Users can monitor progress, adjust parameters, and test results directly via API endpoints, ensuring a smooth and efficient workflow.

By combining versatility, ease of use, and professional output, the FLUX Pro Finetuning API sets a new standard for custom content creation in generative AI. With the tool now available, Black Forest Labs aims to transform the way individuals and organizations approach custom media generation, unlocking creative possibilities on an unprecedented scale.