FLUX.1 [dev] is a 12 billion parameter text-to-image model developed by Black Forest Labs for high-quality image generation and editing from text prompts.It excels at generating photorealistic images with strong prompt adherence, real-world physics understanding (e.g., lighting, spatial relationships), and readable text rendering.
2 providers serve this model. FastRouter routes each request to the best available one, and you can bring your own key for any of them.
falaileonardoRequest parameters you can send with this model.
OpenAI-compatible. Point your SDK at FastRouter, or call the API directly.
<FASTROUTER_API_KEY> with your key · Get your key →black-forest-labs/flux-kontext-proFLUX.1 Kontext [pro] is an advanced image generation and editing model from Black Forest Labs that supports both text prompts and reference images for in-context modifications.
black-forest-labs/flux-pro-2.0FLUX.2 Pro (also styled as Flux-2-Pro or FLUX.2 [pro]) is a production-grade AI image generation and editing model developed by Black Forest Labs, released in November 2025 as the flagship of the FLUX.2 family. It excels in creating high-quality, photorealistic images up to 4 megapixels from text prompts, with advanced controls for editing, multi-reference image use (up to 8 references), and precise outputs suitable for commercial workflows like product photography, UI prototyping, and brand design.
black-forest-labs/flux-schnellFLUX.1 [schnell] is a 12-billion-parameter rectified flow transformer model for text-to-image generation, developed by Black Forest Labs. "Schnell" (German for "fast") is the speed-optimized variant of the FLUX.1 model family, distilled for rapid inference — it can generate high-quality images in as few as 1–4 diffusion steps, making it significantly faster than typical diffusion models while maintaining strong prompt adherence and image fidelity.
Model scores sourced from ArtificialAnalysis