A Tuned vLLM Semantic Router Drastically Reduced Our Anthropic Bill
Liatrio benchmarked a tuned vLLM Semantic Router against Claude Opus and Sonnet on 62 agentic tasks. The router cut cost by about a third versus Opus alone, but solved nine fewer tasks (80 vs 89). Tuning took three rounds; results reflect work the router was tuned against, not a held-out test set.



