Cut Your Claude API Bill by 90% Using Prompt Caching in TypeScript


            
        May 18, 2026
    
    
Cut Your Claude API Bill by 90% Using Prompt Caching in TypeScript


        How to use Anthropic prompt caching in TypeScript to cut Claude API costs by up to 90%. Where to place cache_control breakpoints, TTL tradeoffs, and real RAG cost data.
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