export interface PerplexityOptions {
    model?: string;
    stride?: number;
}
export interface PerplexityResult {
    perplexity: number;
    score: number;
    tokenCount: number;
    averageLogProb: number;
    modelUsed: string;
    feedback: string;
}
export declare const calculatePerplexity: (text: string, options?: PerplexityOptions) => Promise<PerplexityResult>;
export declare const clearPerplexityCache: () => void;
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