import type { Provider, APIResponse } from '../types.js';
export declare abstract class BaseProvider implements Provider {
    abstract name: string;
    protected apiKey?: string;
    protected baseUrl: string;
    constructor(apiKey?: string);
    abstract call(model: string, prompt: string): Promise<APIResponse>;
    isAvailable(): boolean;
    protected makeRequest(url: string, body: any, headers: Record<string, string>, timeoutMs?: number, maxRetries?: number): Promise<any>;
    protected estimateCost(tokens: number, model: string): number;
}
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