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Stable Diffusion 4

Stability AIUnited KingdomOpen sourceOpen weightsstability-communityimage_gen

Diffusion-Transformer architecture; native 4K, dedicated text-rendering module.

Release history (2)

  1. SD4 Base
    stableApr 6, 2026
    stabilityai/stable-diffusion-4-base

    Diffusion-Transformer architecture; native 4K target; dedicated text-rendering module.

  2. SD4 Ultra
    Current stableCutting edgestableApr 6, 2026
    stabilityai/stable-diffusion-4-ultra

    Flagship — 4096x4096 native; community license.

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