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remove FSDP prefix when using save_pretrained with FSDP2 #40207

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remove FSDP prefix when using save_pretrained with FSDP2 #40207

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remove FSDP prefix when using save_pretrained with FSDP2
winglian Aug 15, 2025
ceaca6d
Merge branch 'main' into fsdp2-model-name-save
S1ro1 Aug 19, 2025
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3 changes: 2 additions & 1 deletion src/transformers/modeling_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3923,7 +3923,8 @@ def save_pretrained(
model_to_save.config.torch_dtype = str(dtype).split(".")[1]

# Attach architecture to the config
model_to_save.config.architectures = [model_to_save.__class__.__name__]
# When using FSDP2, unwrapping is a noop, so the model name doesn't change back to the original model name
model_to_save.config.architectures = [model_to_save.__class__.__name__.lstrip("FSDP")]

# If we have a custom model, we copy the file defining it in the folder and set the attributes so it can be
# loaded from the Hub.
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