Black Forest Labs, a German AI startup founded by former Stability AI engineers, launched FLUX.2 klein, a new open-source AI image generator capable of producing images in under a second, according to a VentureBeat report. The release, which occurred yesterday, emphasizes speed and lower compute requirements.
The klein series features two primary parameter counts: 4 billion (4B) and 9 billion (9B). The 4B parameter version is available under the Apache 2.0 license, enabling commercial use. The model weights are available on Hugging Face and code on Github.
According to VentureBeat, the new models are already being integrated into platforms like Fal.ai, demonstrating a trend towards democratizing AI technology and lowering barriers to entry.
The FLUX.2 family also includes larger models, "max" and "pro," released in November 2025, which focus on photorealism and "grounding search" capabilities. The klein models, in contrast, prioritize speed, achieving sub-second generation times on an Nvidia GB200.
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