Level 5: AI / LLM systems · L5.4 LLM gateways, caching & cost control
Prompt caching as architecture
Structure prompts with a stable prefix to reuse cached computation.
12 min · Pro
What you take away
- Prompt caching reuses the prefill computation for a byte-identical prefix; it never reuses the answer, so it cannot make a response wrong.
And 3 more inside the class, in Pro.
How the class is laid out
- The problem
- A bookmark in the handbook
- Why it is free of risk, and why it is not free
- Check your understanding