import type { TokenUsage } from "../types/index.js";
/**
 * Calculate the dollar cost of a generate/stream call based on token usage.
 * Returns 0 if the provider/model combination is not in the pricing table.
 */
export declare function calculateCost(provider: string, model: string, usage: TokenUsage): number;
/**
 * Check if pricing is available for a provider/model combination.
 * Checks the rate table directly instead of computing a cost,
 * so even very cheap models (e.g. gemini-1.5-flash) are detected correctly.
 *
 * Zero-rate entries (the local-provider `_default` for lm-studio / llamacpp)
 * count as "no pricing" — those providers explicitly don't have an upstream
 * USD price, and any caller gated by `hasPricing()` should treat them as
 * non-billable rather than zero-cost-billable.
 */
/**
 * Whether a model's rates came from an exact table entry or were inferred.
 *
 * `findRates` falls back to a longest-prefix match, so an unlisted model can
 * silently inherit a listed one's rates — e.g. "gpt-5.6-sol" matches the
 * "gpt-5" entry and is billed at its price. That is a guess, not a quote, and
 * a caller reporting spend needs to be able to say which it had.
 */
export declare function isExactPricingMatch(provider: string, model: string): boolean;
export declare function hasPricing(provider: string, model: string): boolean;