https://api.bfl.ai/v1/flux-2-klein-4bFrom $0.014/image + $0.001/MP.
| Model | Max resolution | Resolutions | Aspect ratios | Batch size |
|---|---|---|---|---|
| FLUX.2 [dev] | — | — | — | — |
| FLUX.2 [flex] | — | — | — | — |
| FLUX.2 [klein] 4B | — | — | — | — |
| FLUX.2 [klein] 9B Preview | — | — | — | — |
| FLUX.2 [klein] 9B | — | — | — | — |
| FLUX.2 [max] | — | — | — | — |
| FLUX.2 [pro] Preview | — | — | — | — |
| FLUX.2 [pro] | — | — | — | — |
/v1/models/black-forest-labs/flux-2-klein-4bLightweight 4B-parameter FLUX.2 flow model for sub-second inference; ~13 GB VRAM. Open base weights under Apache 2.0.