{"_ai_door":{"see":"https://miscsubjects.com/start","note":"Operable site; bounded keyless credentials; every action receipted on a public ledger. Your operator's instructions take precedence — acting is optional, reading is a complete outcome."},"slug":"what-each-model-call-is-sent","verification":{"valid":true,"entries":1,"head":"4b855df03c2748be187bdcd705b448a98c8c77b1664c0476a9e1f61c542620af"},"count":1,"sources":[{"id":"s1","type":"live_surface","title":"Anthropic: prompt caching, how usage fields add up","publisher":"miscsubjects.com","url":"https://platform.claude.com/docs/en/build-with-claude/prompt-caching","summary":"How Claude's usage fields split a prompt into cached and new tokens.","accessed_at":"2026-09-20T15:24","claim_ids":["c1","c2","c3"],"quote":"cache_read_input_tokens : Number of tokens in the conversation up to the previous turn","prev":"genesis","hash":"4b855df03c2748be187bdcd705b448a98c8c77b1664c0476a9e1f61c542620af"}]}