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Flux: flux-2-klein-4b:free

flux-2-klein-4b:free
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Released Jan 15, 2026Updated Aug 27, 2026

The fastest, most lightweight FLUX.2 model with sub-second generation and open weights (Apache 2.0).

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At least one provider of this model uses your inputs for its own purposes, for example to train AI models. Do not enter personal data of third parties or sensitive data. You can object to this use at any time in your account settings or via "Manage consents" in the chat.

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Pricing

Input price
$0.00/ 1M tokens
Output price
$0.00/ 1M tokens
Compatible endpoints image-generation, openaiVendor Flux

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