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vLLM fixes Qwen TurboQuant error

·2026.05.05 09:30

Key point

vLLM has resolved the unimplemented TurboQuant error affecting Qwen 3.5+ models caused by an issue with Mamba layers.

Details

A patch has been merged into the vLLM project that fixes a TurboQuant-related error that occurred when using Qwen 3.5+ models.

Previously, TurboQuant could not be used because a 'Not Implemented' error occurred due to Mamba layers, but this update has resolved the issue. This allows users to reliably apply TurboQuant quantization to Qwen 3.5+ models.

inferenceqwenquantizationvllmturboquantmamba
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