⚙️ AI Hardware

Prompt Caching: The Boring Fix That Slays LLM Bills

We all braced for AI's trillion-dollar tab. Prompt caching? It just made the math work—finally.

Elena Vasquez 📅 Mar 19, 2026 ⏱️ 3 min read 👁️ 6 views

⚡ Key Takeaways

Prompt caching slashes LLM input costs by up to 90% and latency by 80% via prefix reuse.
It's old-school caching applied to LLM prefill—obvious fix for repeat-heavy apps.
Expect mass adoption; it'll commoditize AI inference like CPU caches did processors.

Cast your vote and see what theAIcatchup readers think

Written by

Senior editor at theAIcatchup. Generalist covering the biggest AI stories with a sharp, skeptical eye.

#LLM inference #OpenAI #ai-optimization #prompt-caching

Get the best AI stories of the week in your inbox — no noise, no spam.

Originally reported by Towards Data Science