How the 0.85 similarity threshold was chosen for cache hits
Why Agent Brain's semantic cache uses a 0.85 similarity threshold, and what happens when that number is set too high or too low.
By Agent Software
Scheduled article
This post is scheduled to publish in full on November 16, 2026. The final URL is already live so social previews, search crawlers, and future readers all resolve to the same article.
A single tunable number decides whether Agent Brain's cache saves you tokens safely or starts returning answers to the wrong question.
- Final publish date: November 16, 2026
- Primary categories: Architecture
- Tags: #suite #agent-brain #architecture
In the meantime, the related posts below cover the adjacent product and engineering context this article builds on.
