From Blind Billing to User-Level AI Cost Visibility

Every LLM-powered application incurs costs that mysteriously appear in invoices, yet production teams often have no visibility into which users or features drive those expenses. Without user-level cost attribution, companies lack critical data for pricing decisions, profitability analysis, and AI optimization. Three practical, battle-tested approaches using SDK wrapping, OpenTelemetry integration, and event emission can turn this invisible metric into actionable intelligence in minutes.