# Redis built a cache that cuts LLM costs

> Source: <https://redis.io/langcache/>
> Published: 2026-09-11 08:54:21+00:00

"Our voice app for patient care gets a lot of specific treatment questions, so it has to be absolutely accurate, and that's what LangCache does. I was worried about LLM costs for high usage, but with LangCache, we're getting a 70% cache hit rate, which saves 70% of our LLM spend. On top of that, it’s 4X faster, which makes a huge difference for real-time patient interactions."