Prompt caching lets an LLM provider reuse the computation for a repeated prompt prefix, cutting input cost and time to first token. This guide covers provider differences, prompt structure, cost trade-offs, and how to automate cache markers at the gateway.

Prompt caching lets an LLM provider reuse the computation for a repeated prompt prefix, cutting input cost and time to first token. This guide covers provider differences, prompt structure, cost trade-offs, and how to automate cache markers at the gateway.