Learning/AI Agents — Complete Guide/Lesson 27
Chapter 9·Lesson 3 of 3·10 min

Observability

Cost and latency

Measure the economics and performance of every agent run.

Lesson overview

Cost and latency

Track model tokens, tool latency, total duration, retries, and cost per successful task. Tail latency matters because a small number of slow runs can dominate user experience.

Learning path

Theory → Example → Code → Practice → Quiz → Challenge → Completion

0/6 done

Step 1

Theory

Cost and latency

Track model tokens, tool latency, total duration, retries, and cost per successful task. Tail latency matters because a small number of slow runs can dominate user experience.

Step 2

Example

Example

Apply Cost and latency to a realistic production scenario and trace the decision step by step.

Step 3

Code

Code

Add implementation notes or a runnable example for this concept.

Step 4

Practice

Practice

Write down the inputs, expected output, constraints, and one failure case for Cost and latency.

Step 5

Quiz

Quiz coming soon.

Step 6

Challenge

Challenge

Design a production-ready solution for Cost and latency and explain one important trade-off.

Complete every stage

Work through every step in order, then the lesson will be marked complete.

Each chapter and subtopic has its own public URL under /ai-agent.