Building Multi-Objective AI Agents: Beyond Semantic Similarity with Value Models (2026 Guide)

Your AI agent just recommended wireless headphones to a customer who bought the exact same pair yesterday. Cost: $40,000 in returns this year. Most agents optimize for semantic similarity alone—ignoring stock status, profit margins, and user history. Learn how to build multi-objective agents that balance business logic with relevance using value model expressions, cutting query latency from 400ms to 50ms while optimizing for actual revenue.