vLLM Semantic Router: small-first routing cuts cost 54% while adding 16.45 accuracy points
vllm_project · x · 2026-10-10
- vLLM Semantic Router introduces System One Auto: instead of a single decision model, Kai 0.6B answers first, escalating to Vega 27B only when needed.
- On public JevBench requests: -54% estimated cost and -20% mean latency vs. Vega-only, while +16.45 accuracy points vs. Kai alone.
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