export interface ModelPrice {
    input: number;
    cachedInput: number;
    cacheWrite?: number;
    output: number;
}
export interface ModelUsage {
    inputTokens?: number;
    cachedInputTokens?: number;
    cacheWriteInputTokens?: number;
    outputTokens?: number;
}
export declare function normalizeModelId(model: string): string;
export declare function priceFor(model: string | undefined): ModelPrice | undefined;
export declare function costOfUsage(model: string | undefined, usage: ModelUsage): number | undefined;
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