Micro-Agent: Beat Frontier Models with Collaboration Inside Model API

Routers in AI inference are evolving from simple model-selection tools into orchestration layers that can improve model capabilities by coordinating collaboration between multiple models behind a single API endpoint. vLLM Semantic Router implements this concept through "loopers"—bounded execution runtimes that fan out requests to multiple models, aggregate their responses, and return a unified result while maintaining the simplicity of a standard API call. This approach allows production systems to optimize costs and quality without exposing underlying complexity to users.