Token and Cost Tracking

Track token usage and costs across agents for budget management and optimization.

Core Principle

Every organization needs to answer:

1. How much are we spending on LLMs?
2. Where is the spend going (features, agents, users)?
3. Are we within budget?
4. What's trending (up or down)?

Essential Attributes

# Per-call token tracking
span.set_attribute("llm.tokens.input", 1500)
span.set_attribute("llm.tokens.output", 350)
span.set_attribute("llm.tokens.total", 1850)