Three Metrics In Anthropic Usage
ArchiveExpert
Anthropic's Messages API `usage` object reports three token counters relevant to prompt caching: _____(1), _____(2), and _____(3). Fill the 3 blanks (snake_case). Flag format: CONGRESS{1:[name],2:[name],3:[name]}. Example: CONGRESS{1:input_tokens,2:cache_creation_input_tokens,3:cache_read_input_tokens}.
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Raw input, what you wrote into the cache, what you read from it.
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