Add Cached Tokens to UsageResponse #642
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Openai Api has added prompt caching : https://openai.com/index/api-prompt-caching/
This has added new property to the usage response returned this contain the number of tokens that where retrieved from the cache.
Here is the example from the docs
usage: {
total_tokens: 2306,
prompt_tokens: 2006,
completion_tokens: 300,
prompt_tokens_details: {
cached_tokens: 1920,
audio_tokens: 0,
},
completion_tokens_details: {
reasoning_tokens: 0,
audio_tokens: 0,
}
}
I have added a new class for prompt_tokens_details with property cached_tokens . The prompt_tokens_details has been added as a property of usage.