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Support dLLM in GRPO reference model creation#3743
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Tavish9 suggested changesJul 18, 2025
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Not working here for language model.
AutoModel would not loadlm_head.
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The current
GRPOTrainercreates a reference model withAutoModelForCausalLMwhen deepspeed zero3 is enabled. This is not compatible with recent diffusion language models likeDiffuCoder. These models need to be loaded usingAutoModelinstead ofAutoModelForCausalLM.The proposed change is a simple one-liner.
Fixes#3742