Your Claude API bill is higher than it should be. You're sending 3,000-token system prompts on every call, using Opus for tasks Haiku handles perfectly, dumping entire documents into context when you only need a paragraph, and letting the model write 500-word responses when you need a sentence. One developer cut his monthly bill from $2,400 to $380 in a single afternoon. Same app. Same features. Same output quality. 84% cheaper.

The Token Saver's Playbook is the developer's guide to cutting Claude API costs by 50-85% without sacrificing output quality. Inside: the model selection framework that puts the right model on every task, prompt compression techniques that cut input tokens by 40-60%, context management strategies including RAG and sliding windows, prompt caching implementation that saves 90% on repeated system prompts, output optimization with max_tokens and structured formats, and architecture patterns used by production AI apps processing millions of calls.

Run the token audit from Chapter 8. It takes 2 hours. Most teams find 50-80% in savings. The engineering time pays for itself in the first week. Your API bill will never be the same.