export interface ModelPricing {
    inputPerMTok: number;
    outputPerMTok: number;
    cachedInputPerMTok?: number;
}
export declare const MODEL_PRICING: ReadonlyMap<string, ModelPricing>;
export declare function deriveCallCostUsd(model: string, inputTokens: number, outputTokens: number, cachedInputTokens?: number): number | undefined;