/** The aspect ratio of the output image. */
export declare const GptImage15RequestAspectRatio: {
    readonly One1: "1:1";
    readonly Three2: "3:2";
    readonly Two3: "2:3";
};
export type GptImage15RequestAspectRatio = (typeof GptImage15RequestAspectRatio)[keyof typeof GptImage15RequestAspectRatio];