Token Cost Calculation: Why Your API Bill Is High and How to Fix It
You ran a few tests, maybe built a small prototype, and then your OpenAI or Anthropic bill arrived — and it was way higher than you expected. Sound familiar? Understanding exactly how tokens are counted, how costs are calculated, and where the hidden waste lives is the single most impactful skill for anyone building with LLM APIs in 2026. This post walks you through the mechanics of tokenization, shows you how to measure usage precisely, and gives you battle-tested strategies to cut costs without sacrificing response quality. Table of Contents What Is a Token, Really? How Costs Are Calculated Counting Tokens Before You Send Where Tokens Hide: The Usual Suspects Strategies to Reduce Token Usage Prompt Compression Techniques Caching and Batching Monitoring and Budgeting in Production Putting It All Together 🔤 What Is a Token, Really? A token is not a word, and it is not a character — it sits somewhere in betw...