import { CostEstimate } from '../types';
import { CompletionRequest } from '../types/request-types';
/**
 * Estimate cost for a completion request
 * Base implementation returns 0 cost - override in provider-specific implementations
 */
export declare function estimateCost(request: CompletionRequest, inputPricePerToken?: number, outputPricePerToken?: number): CostEstimate;
/**
 * Calculate actual cost from token usage
 */
export declare function calculateActualCost(promptTokens: number, completionTokens: number, inputPricePerToken: number, outputPricePerToken: number): number;
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