Function openaiUsageToUsage

shared/registry/usage-headers.ts:76–164

(openaiUsage: {
    prompt_tokens: number;
    completion_tokens: number;
    total_tokens: number;
    prompt_tokens_details?: {
        cached_tokens?: number | null;
        audio_tokens?: number | null;
        image_tokens?: number | null;
    } | null;
    cached_input_tokens?: number | null;
    cache_read_input_tokens?: number | null;
    cache_creation_input_tokens?: number | null;
    reasoning_tokens?: number | null;
    completion_tokens_details?: {
        reasoning_tokens?: number | null;
        audio_tokens?: number | null;
        accepted_prediction_tokens?: number | null;
        rejected_prediction_tokens?: number | null;
    } | null;
})

 * visible-text count.
 */
export function openaiUsageToUsage(openaiUsage: {
    prompt_tokens: number;
    completion_tokens: number;
    total_tokens: number;
    prompt_tokens_details?: {
        cached_tokens?: number | null;
        audio_tokens?: number | null;
        image_tokens?: number | null;
    } | null;
    cached_input_tokens?: number | null;
    cache_read_input_tokens?: number | null;
    cache_creation_input_tokens?: number | null;
    reasoning_tokens?: number | null;
    completion_tokens_details?: {
        reasoning_tokens?: number | null;
        audio_tokens?: number | null;
        accepted_prediction_tokens?: number | null;
        rejected_prediction_tokens?: number | null;
    } | null;
}): Usage {
    const promptCachedTokens =
        openaiUsage.prompt_tokens_details?.cached_tokens ||
        openaiUsage.cached_input_tokens ||
        openaiUsage.cache_read_input_tokens ||
        0;
    const promptCacheWriteTokens = openaiUsage.cache_creation_input_tokens ?? 0;
    const promptDetails = [
        promptCachedTokens,
        promptCacheWriteTokens,
        openaiUsage.prompt_tokens_details?.audio_tokens || 0,
        openaiUsage.prompt_tokens_details?.image_tokens || 0,
    ];

    const rawCompletionReasoningTokens =
        openaiUsage.completion_tokens_details?.reasoning_tokens ||
        openaiUsage.reasoning_tokens ||
        0;
    const completionDetails = [
        openaiUsage.completion_tokens_details?.accepted_prediction_tokens || 0,
        openaiUsage.completion_tokens_details?.rejected_prediction_tokens || 0,
        openaiUsage.completion_tokens_details?.audio_tokens || 0,
        rawCompletionReasoningTokens,
    ];

    const promptDetailTokens = sumTokens(promptDetails);
    const completionDetailTokens = sumTokens(completionDetails);
    const { promptDetailsAreAdditive, completionDetailsAreAdditive } =
        detectUsageConvention(
            openaiUsage,
            promptDetailTokens,
            completionDetailTokens,
            rawCompletionReasoningTokens,
        );

    const cappedPromptDetails = promptDetailsAreAdditive
        ? promptDetails
        : capDetailsToTotal(openaiUsage.prompt_tokens, promptDetails);
    const cappedCompletionDetails = completionDetailsAreAdditive