Code Mala Tang

Mar 9, 2026 · Artificial Intelligence

How Claude’s New Prompt Caching Cuts Token Costs by 90% for Long‑Running Agents

Claude’s API now automatically caches static parts of prompts—system instructions, tool definitions, and context—so repeated calls reuse these sections at only 10% of the standard token price, dramatically reducing costs for multi‑turn agents, but developers must manage prefixes and avoid cache‑breaking changes.