/**
 * Gateway-served model pricing, providers whose own /models payload carries
 * machine-readable rates (beyond OpenRouter, which model-limits.ts already
 * fetches). Evidence per gateway (probed 2026-07-12):
 *
 *   - aihubmix  GET https://aihubmix.com/api/v1/models
 *     `pricing: { input, output, cache_read?, cache_write? }`, absolute USD
 *     per 1M tokens (claude-fable-5: input 11 / output 55 / cache_read 1.1 /
 *     cache_write 13.75).
 *   - vercel-ai-gateway  GET https://ai-gateway.vercel.sh/v1/models
 *     `pricing: { input, output, input_cache_read?, input_cache_write? }`,
 *     USD per single token as strings (OpenRouter-style). Tiered variants
 *     (`input_tiers` etc.) exist; the flat base rate is used.
 *
 * Each gateway gets its own 24h-TTL cache file. A failed refresh degrades to
 * the cached rates with their fetch date, never to zero. A model absent
 * from the payload resolves to null (unpriced), never $0.
 */
import type { ProviderServedPricing } from './model-pricing.js';
export declare function gatewayPricingCachePath(cacheDir: string, providerId: string): string;
export interface GatewayPricingServiceOptions {
    readonly cacheDir: string;
}
/**
 * Lazy, cache-first pricing lookups for gateways that publish rates. The
 * first lookup for a gateway loads its disk cache and, when the cache is
 * absent or stale, starts ONE background refresh; lookups keep serving the
 * cached rates (with their date) meanwhile. No cache and no completed
 * refresh -> null (honest unpriced), never $0.
 */
export declare class GatewayPricingService {
    private readonly options;
    private readonly caches;
    private readonly refreshing;
    constructor(options: GatewayPricingServiceOptions);
    /** True when this provider id has a pricing-bearing /models adapter. */
    static supports(providerId: string): boolean;
    getPricing(providerId: string, modelId: string): ProviderServedPricing | null;
    private ensureCache;
    private cachePath;
    private loadCache;
    private startRefresh;
    refresh(providerId: string): Promise<number>;
}
//# sourceMappingURL=gateway-pricing.d.ts.map