Reduce LLM latency with prefix-aware routing on Amazon SageMaker Inference

AWS Machine LearningSeptember 10, 2026en

Amazon SageMaker Inference now offers prefix-aware routing, a routing strategy that sends requests sharing the same prompt prefix to the same instance so the KV cache stays warm. In benchmarks on Llama 3.1 70B, it reduced P50 time-to-first-token by up to 77% and raised KV cache hit rates from about 25% to over 80%.

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