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Allow advanced users to override model_type in AutoConfig.from_pretrained #45058

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Merged
hmellor merged 1 commit into from
Mar 27, 2026
Merged

Allow advanced users to override model_type in AutoConfig.from_pretrained #45058

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9 changes: 9 additions & 0 deletions src/transformers/configuration_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -760,6 +760,15 @@ def _get_config_dict(
if "model_type" not in config_dict and is_timm_config_dict(config_dict):
config_dict["model_type"] = "timm_wrapper"

# Some checkpoints may contain the wrong model_type in the config file.
# Allow the user to override it but warn them that it might not work.
if "model_type" in kwargs and config_dict["model_type"] != kwargs["model_type"]:
logger.warning(
f"{configuration_file} has 'model_type={config_dict['model_type']}' but you overrode "
f"it with 'model_type={kwargs['model_type']}'. This may lead to unexpected behavior."
)
config_dict["model_type"] = kwargs["model_type"]

return config_dict, kwargs

@classmethod
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