Third party providers rarely support caching. With caching the expensive US models end up being like 2x the price (e.g sonnet) and often much cheaper (e.g gpt-

Third party providers rarely support caching. With caching the expensive US models end up being like 2x the price (e.g sonnet) and often much cheaper (e.g gpt-5 mini) If they start caching then US companies will be completely out priced.