export interface ResponseUsage {
    input_tokens?: number | undefined;
    output_tokens?: number | undefined;
    total_tokens?: number | undefined;
    input_tokens_details?: ResponseUsage.InputTokensDetails | undefined;
    output_tokens_details?: ResponseUsage.OutputTokensDetails | undefined;
    /** Accepts any additional properties */
    [key: string]: any;
}
export declare namespace ResponseUsage {
    interface InputTokensDetails {
        /** Prompt tokens served from cache on `glm5.3`. Always present in `input_tokens_details`; **`0`** on a cache miss. Billed at the cached-input rate when non-zero. */
        cached_tokens?: number | undefined;
        /** Accepts any additional properties */
        [key: string]: any;
    }
    interface OutputTokensDetails {
        /** Tokens spent on the chain-of-thought. Billed as output tokens. */
        reasoning_tokens?: number | undefined;
        /** Accepts any additional properties */
        [key: string]: any;
    }
}