import { LanguageModelV3, LanguageModelV3CallOptions, LanguageModelV3GenerateResult, LanguageModelV3StreamResult } from '@ai-sdk/provider';
interface Settings {
    models: Array<LanguageModelV3>;
    retryAfterOutput?: boolean;
    modelResetInterval?: number;
    shouldRetryThisError?: (error: Error) => boolean;
    onError?: (error: Error, modelId: string) => void | Promise<void>;
}
export declare function createFallback(settings: Settings): FallbackModel;
export declare function defaultShouldRetryThisError(error: any): boolean;
export declare class FallbackModel implements LanguageModelV3 {
    readonly specificationVersion: "v3";
    get supportedUrls(): Record<string, RegExp[]> | PromiseLike<Record<string, RegExp[]>>;
    get modelId(): string;
    readonly settings: Settings;
    currentModelIndex: number;
    private lastModelReset;
    private readonly modelResetInterval;
    retryAfterOutput: boolean;
    constructor(settings: Settings);
    get provider(): string;
    private checkAndResetModel;
    private switchToNextModel;
    private retry;
    doGenerate(options: LanguageModelV3CallOptions): PromiseLike<LanguageModelV3GenerateResult>;
    doStream(options: LanguageModelV3CallOptions): PromiseLike<LanguageModelV3StreamResult>;
}
export {};
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