FLUX.2 [klein] generates in under a second, with Apache 2.0 weights at 4B
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Introducing FLUX.2 [klein]. Blazing fast. Beautiful. Generate stunning images in under a second while maintaining exceptional quality. Great for fast editing, changing styles, and developing ideas from 0 → 1. Available via API, or run it locally - Klein 4B under Apache 2.0, Klein 9B as open weights. Try it for free in our demo app (link in the thread).
Context
FLUX.2 klein packages image generation and editing into smaller models that developers can run locally or access through an API. Black Forest Labs positions them for rapid iteration, reporting generation times below a second in its tested configurations. The deployment choice also involves licensing: the four-billion-parameter models use Apache 2.0, while the nine-billion-parameter weights use the FLUX Non-Commercial License. The release article distinguishes these variants and identifies GB200 hardware for its main speed comparison. Local availability therefore does not imply identical usage terms or identical speed on a personal computer.
- open weights — A model whose trained parameters are published for anyone to download and run — unlike API-only models you can access but never possess.
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