/**
 * The pricing for Gemini models per 1 million tokens in USD.
 *
 * Note: This is an estimation.
 *
 * @see https://ai.google.dev/pricing
 */
export declare const GEMINI_PRICING: {
    'gemini-1.5-flash': {
        input: number;
        output: number;
    };
};
/**
 * The model to use for price estimation.
 */
export declare const GEMINI_MODEL_FOR_ESTIMATION = "gemini-1.5-flash";
/**
 * Gemini pricing entry per 1 million tokens.
 */
export type GeminiPricing = {
    input: number;
    output: number;
};
/**
 * Resolves Gemini pricing for the requested model.
 *
 * It first tries exact match, then prefix match, then falls back to a stable
 * default pricing model.
 */
export declare function resolveGeminiPricing(modelName?: string): GeminiPricing;
/**
 * A an estimation of how many characters are in one token.
 */
export declare const CHARS_PER_TOKEN = 4;