vllm - 💡(How to fix) Fix Gemma 4 support: model_type `gemma4` not recognized [1 participants]

TL;DR

Upgrade the transformers library to version 5.5.0 or later to support the gemma4 model type.

Guidance

• Verify the current version of transformers installed in the project using pip show transformers or conda list transformers.
• Check the compatibility of the gemma4 model with the current version of transformers and consider upgrading if necessary.
• Review the related issues (vllm-project/llm-compressor#2562 and vllm-project/llm-compressor#2561) for additional context and potential workarounds.
• Test the model with the updated transformers version to ensure compatibility and resolve the error.

Example

No code snippet is provided as it is not explicitly supported by the issue, but the command to upgrade transformers using pip would be: pip install --upgrade transformers

Notes

The solution assumes that the issue is solely due to the version of transformers being older than 5.5.0. If other factors are contributing to the error, additional troubleshooting may be necessary.

Recommendation

Upgrade to a version of transformers that supports the gemma4 model type (i.e., 5.5.0 or later), as this is the most direct solution to the error.