import type { TiktokenModel } from 'tiktoken';
import { ITokenizer } from './i-tokenizer.js';
import { LruCache } from '../../utils/lru-cache.js';
export declare class TiktokenTokenizer implements ITokenizer {
    readonly modelName: string;
    private readonly encoder;
    private readonly cache;
    constructor(modelName: string, cache?: LruCache<string, number>);
    countTokens(text: string): Promise<number>;
    free(): void;
    static supports(modelName: string): boolean;
    static mapToTiktokenModel(modelName: string): TiktokenModel;
    private static tryMap;
}
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