/**
 * OpenAI LLM Provider
 *
 * Provider for OpenAI API (https://api.openai.com).
 * Supports GPT-4, GPT-4 Turbo, and GPT-3.5.
 *
 * Environment variables:
 * - OPENAI_API_KEY: Required API key
 * - OPENAI_BASE_URL: Optional base URL (default: https://api.openai.com/v1)
 * - OPENAI_MODEL: Model to use (default: gpt-4)
 */
import type { LLMProvider, GenerationRequest, GenerationResponse } from './index.js';
export interface OpenAIConfig {
    apiKey?: string;
    baseURL?: string;
    model?: string;
    timeout?: number;
}
export declare class OpenAIProvider implements LLMProvider {
    name: string;
    models: string[];
    private readonly apiKey;
    private readonly baseURL;
    private readonly defaultModel;
    private readonly timeout;
    constructor(config?: OpenAIConfig);
    isAvailable(): Promise<boolean>;
    generate(request: GenerationRequest): Promise<GenerationResponse>;
    stream(request: GenerationRequest): AsyncIterable<string>;
    countTokens(text: string): number;
    private buildMessages;
}
/**
 * OpenAI-specific error
 */
export declare class OpenAIError extends Error {
    code: string;
    details?: Record<string, unknown>;
    constructor(message: string, details?: Record<string, unknown>);
}
/**
 * Create OpenAI provider with default settings
 */
export declare function createOpenAIProvider(config?: OpenAIConfig): OpenAIProvider;
/**
 * Check if OpenAI is available and configured
 */
export declare function checkOpenAISetup(): Promise<boolean>;