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31 lines
1.3 KiB
C#
31 lines
1.3 KiB
C#
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// ReSharper disable ClassNeverInstantiated.Global
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namespace AIStudio.Provider.OpenAI;
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/// <summary>
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/// What OpenAI reports a Responses API call cost, as it closes the stream.
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/// </summary>
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/// <remarks>
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/// The input tokens are the whole request. What the API took from its cache is a share of them,
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/// not an addition to them, which is why that detail stays unread. Read on 2026-09-24 at
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/// https://developers.openai.com/api/docs/guides/prompt-caching.
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///
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/// The block states more than this, the output and its reasoning share among it. Those are left
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/// unread on purpose, for the reason given at TokenUsage: no later request carries them.
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/// </remarks>
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public sealed record ResponsesUsage
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{
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/// <summary>
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/// What everything sent to the model cost, the cached part included.
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/// </summary>
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public int? InputTokens { get; init; }
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/// <summary>
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/// States what this block reports, as far as it can be believed.
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/// </summary>
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/// <remarks>
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/// Whether the block describes the request at all is not decided here but by the response
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/// around it, cf. ResponsesResponse.
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/// </remarks>
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/// <returns>The usage, or TokenUsage.UNKNOWN when the block states nothing usable.</returns>
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public TokenUsage ToTokenUsage() => TokenUsage.OfReported(this.InputTokens);
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}
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