/**
 * Model-specific inputs for `imagen4`.
 */
export interface InputImagen4 {
    /** Generation prompt. At most 5000 characters. */
    prompt: string;
    /** Number of outputs generated per job. Only 1 is supported. */
    num_outputs?: number | undefined;
    /** Rewrite the prompt before generation. An LLM expands it into a fuller description and the model receives that text instead of the submitted one; the result's `prompt` reports what ran. */
    enhance_prompt?: boolean | undefined;
    /** Output aspect ratio. */
    aspect_ratio: InputImagen4.AspectRatio;
    /** Output resolution. */
    resolution: InputImagen4.Resolution;
}
export declare namespace InputImagen4 {
    /** Output aspect ratio. */
    const AspectRatio: {
        readonly Sixteen9: "16:9";
        readonly Nine16: "9:16";
        readonly Four3: "4:3";
        readonly Three4: "3:4";
        readonly One1: "1:1";
    };
    type AspectRatio = (typeof AspectRatio)[keyof typeof AspectRatio];
    /** Output resolution. */
    const Resolution: {
        readonly OneK: "1K";
        readonly TwoK: "2K";
    };
    type Resolution = (typeof Resolution)[keyof typeof Resolution];
}