Flux Dev is a state-of-the-art text-to-image model developed by Black Forest Labs, released in August 2024 and gaining momentum as the go-to choice for AI artists and developers seeking high-quality image generation capabilities. Flux Dev is part of a suite of text-to-image models, with Flux Pro being the flagship most detailed model, Flux Dev balancing detail and speed, and Flux Schnell being the fastest model with less detail. Flux Dev is free to use for non-commercial purposes but requires a license or partnership for revenue-generating use cases. Flux Pro is closed-source and not free to use, while Flux Schnell is free to use and fine-tune commercially under the Apache 2.0 license. Flux can be run through various interfaces such as ComfyUI, Diffusers, or fine-tuning, and it has effectively succeeded Stable Diffusion as the best open-weight diffusion model for AI image generation.