export type ModelPricing = {
    inputPer1mTokens: number;
    outputPer1mTokens: number;
    currency?: string;
};
export type TokenUsage = {
    promptTokens?: number;
    completionTokens?: number;
    totalTokens?: number;
};
export type ProviderCostMetadata = {
    source: "provider" | "estimate";
    costUsd?: number;
    generationId?: string;
    providerName?: string;
    upstreamInferenceCost?: number;
    cacheDiscount?: number;
    lookupStatus?: string;
    tokensPrompt?: number;
    tokensCompletion?: number;
    nativeTokensPrompt?: number;
    nativeTokensCompletion?: number;
};
export type CallCostRecord = {
    model: string;
    usage: TokenUsage;
    costUsd?: number;
    providerCostUsd?: number;
    unknownUsage: boolean;
    unknownCost: boolean;
    partialUsage?: boolean;
    currency: string;
    providerCost?: ProviderCostMetadata;
};
export declare const DEFAULT_MODEL_PRICING: Readonly<Record<string, ModelPricing>>;
export declare function parseUsage(value: unknown): TokenUsage | undefined;
export declare function parseUsageFromSse(text: string): TokenUsage | undefined;
export declare function lookupPricing(model: string, overrides?: Readonly<Record<string, ModelPricing>>): ModelPricing | undefined;
export declare function estimateCost(usage: TokenUsage, pricing: ModelPricing | undefined): {
    costUsd: number;
    partialUsage: boolean;
} | undefined;
export declare function meterCall(input: {
    model: string;
    usage?: TokenUsage;
    pricing?: Readonly<Record<string, ModelPricing>>;
    providerCost?: ProviderCostMetadata;
}): CallCostRecord;
export declare function formatUsd(amount: number, currency?: string): string;