ImageOpen weights
FLUX.1
Black Forest Labs
Updated May 21, 2026 · Benchmarks via Artificial Analysis, specs & pricing via OpenRouter · Methodology · Report an error
Superseded by FLUX.2
Specifications
- Type
- Image
- Access
- Open weights
- Released
- August 1, 2024
- License
- FLUX.1 [dev] Non-Commercial License
- Parameters
- 12B
- Input
- Text
- Output
- Image
Our take
From the team behind Stable Diffusion, a 12B rectified-flow transformer that set a new bar for open image generation — especially prompt following and text rendering. It quickly became the default open base for image work.