Flux is a family of state-of-the-art image generation models created by Black Forest Labs, founded by the original creators of Stable Diffusion. The FLUX.2 generation, released in late 2025 and early 2026, represents a major leap in image quality and speed. FLUX.2 Pro delivers photorealistic images with up to 4 megapixel resolution, featuring life-like lighting, accurate hands and faces, and robust understanding of physical world details. FLUX.2 Klein achieves sub-second inference times with FP8 quantizations that reduce VRAM by 40% while improving performance by 40%. The platform offers multi-reference image editing, allowing users to change backgrounds, lighting, or poses without altering faces or product designs. Flux models are available through the BFL API with pay-per-image pricing, and the open-source variants (Dev and Schnell) can be run locally. Flux powers image generation for major platforms including Grok (xAI), and is widely integrated into creative tools like ComfyUI. The model family spans from the Apache 2.0-licensed Klein for fast generation to the Pro model for maximum quality, giving users flexibility across speed, quality, and cost requirements.