Agent Arena 分析称缓存可使智能体任务成本降低 260%
Agent Arena 分析了 2026 年 9 月 12 日至 10 月 23 日的 26K 多个智能体会话，覆盖 30 个智能体和 13 家实验室，发现缓存可使典型任务成本降低 260%。其中 Claude Fable 5.1 的典型任务当前成本为 $7.44，不使用缓存则需 $27；单次缓存失效会让典型任务账单增加 5%。
Your agent would cost 260% more without the cache.
We analyzed +26K Agent Arena sessions from September 12 to October 23, 2026, spanning 30 agents and 13 labs.
Caching dramatically changes the economics of a typical task. If every cached token were instead billed at the model's full input price, a task sent to one of Agent Arena's top-10 agents would cost 3.6x as much (260% more).
The savings become especially tangible for leading models. A typical Claude Fable 5.1 task costs $7.44 today; without caching, it would cost $27.
Even a coffee break can carry a hidden price: if your cache expires while you’re away, the agent may have to resend the entire conversation at full input price. In our Agent Arena sample, a single cache invalidation translated to a 5% higher bill for a typical task.
Read more findings from our analysis of the hidden AI price war in the article below.
来源：arena · x.com