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Z-Image AlphaGRPO DVReward - Step 500 EMA

This is a complete native Diffusers Z-Image pipeline exported from zimage_base_diffusionnft_alphagrpo_dvreward_alphagrpo20k_512px_16step_cfg4_28prompts_7train_1dvreward_tp1_2node_nrt at Step 500. The EMA LoRA (rank 256, alpha 256) is merged into BF16 base weights, so FAR and PEFT are not required for inference.

python demo.py --prompt "A red cube beside a blue glass sphere."

The helper uses CFG 4, fixed scheduler shift 6, dynamic shifting disabled, and an explicit 50-update sigma schedule ending at sigma 0.

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BF16
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