The transformers vLLM backend now matches or exceeds the performance of custom vLLM implementations for multiple LLM architectures, enabling model authors to use their existing transformers code for ultra-fast inference without porting anything. It integrates seamlessly with vLLM's optimized inference techniques, such as continuous batching and custom attention kernels, and supports a wide range of models through consistent APIs. The backend dynamically applies inference-specific layer fusions at runtime, matching the speed of custom code, and allows for efficient deployment with minimal changes to serving configurations.

