black-forest-labs/flux-2-klein-4b/editFrom 2 credits per image· Edit ImageFLUX.2 [klein] 4B is Black Forest Labs' compact 4-billion-parameter image model, released on 15 January 2026 under the Apache 2.0 license. Generation and editing live in one model: nine aspect ratios up to 2048 pixels on the long side, and edits from up to three reference images. It is built for speed, with no review of prompts or results, though a small model often dresses people in more clothing than you asked for.
Call it with the model name black-forest-labs/flux-2-klein-4b/edit on POST /jobs/createTask, from 2 credits per image ($0.02). New accounts get 30 free credits to try it in the Playground first.
- Create Image
- Edit Image
- Up to 2K
- Up to 3 reference images
- 9 aspect ratios
Your FLUX.2 Klein 4B · Edit Image runs
Tasks from your account on this model, from the website, the Playground and the API.