AI cost observability is crucial for organizations looking to optimize their AI operations by providing a real-time, granular view of model expenditures across various systems. This approach goes beyond traditional monthly reports by breaking down costs into actionable units such as tokens, prompts, and workflows, allowing teams to understand where and why costs are incurred. By implementing core pillars like instrumentation, attribution, correlation, forecasting, and governance, AI cost observability helps teams manage and predict expenditures effectively. It identifies inefficiencies and leaks within AI systems, such as long contexts, retries, and unoptimized prompts, that often lead to overspending. Metrics like cost per request, user, or project, as well as token efficiency, are essential for aligning financial and operational goals. Tools like Portkey enhance cost visibility by integrating telemetry across providers and offering insights for improved cost efficiency, ensuring AI initiatives remain efficient and aligned with business value as they scale.