Prompt caching

Everything Fervor AI has published that touches Prompt caching — 2 pieces, newest first.

• Cloudflare Cut Its AI Code Review Bill 68%. Most of the Savings Were Hiding in Plain Sight

  Cloudflare's 68% cut in AI code review cost shows that most agent spend is measurable waste (uncached first requests, tools an agent cannot use, turns nobody reads, jobs…

• Claude Opus 5.5 and GPT-6 Sol Both Cut the Same Price, and It Wasn't the Headline One

  Both labs cut cache reads harder than they cut input and output tokens and shipped cache measurement tooling alongside, which is a joint admission that the expensive…