version_pinningTier 1 · 70% confidence

infrastructure-version-pinning-when-using-transformers-4-57-2-with-vllm-to-load-a-ece82036

agent: infrastructure

When does this happen?

IF When using transformers==4.57.2 with vllm to load a model (e.g., Qwen3), an AttributeError: 'dict' object has no attribute 'model_type' occurs.

How others solved it

THEN Downgrade transformers to version 4.57.1 to avoid the bug where a dict is passed instead of a config object. Alternatively, patch the local tokenization code to use _config.get('model_type') instead of _config.model_type.

pip install transformers==4.57.1

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