Add support for capturing usage prompt_tokens_details and completion_tokens_details #94
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The existing code does not capture
prompt_tokens_details
andcompletion_tokens_details
usage objects. For example,prompt_tokens_details
contains thecached_tokens
attribute, which can be useful in understanding how much input prompts are cached (related doc here ). This PR addsPromptTokensDetails
andPromptTokensDetails
attributes to the existingUsage
class. I expect this change to be backward-compatible.Related API reference here