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Black Forest Labs: FLUX.2 Klein 4B

black-forest-labs/flux.2-klein-4b

Released Jan 14, 202640,960 context$0.014 per megapixel

FLUX.2 [klein] 4B is the fastest and most cost-effective model in the FLUX.2 family, optimized for high-throughput use cases while maintaining excellent image quality.

Pricing is based on the output image. The first generated megapixel is charged $0.014. Each subsequent megapixel is charged $0.001.

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Providers for FLUX.2 Klein 4B

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.