/**
 * Public Gemini API token pricing (USD per 1M tokens), used to show how much
 * a gemini-wrapper session *would* have cost on the paid API — i.e. what the
 * free Gemini Web route saved. Prices verified May 2026 from
 * ai.google.dev/gemini-api/docs/pricing.
 */
export type TokenPrice = {
    inputPerMillion: number;
    outputPerMillion: number;
};
/** Resolve the public API price for a Gemini model id. */
export declare function geminiPriceFor(model: string): TokenPrice;
/** Estimate the paid-API cost (USD) of the given token counts for a model. */
export declare function estimateGeminiCost(promptTokens: number, responseTokens: number, model: string): number;
/** Format a saved-cost figure for the header counter. */
export declare function formatSavedCost(usd: number): string;
