export interface OpenAIVisionInput {
    width: number;
    height: number;
    /** OpenAI vision detail; defaults to 'high' if omitted. 'auto' resolves to 'high'. */
    detail?: 'low' | 'high' | 'auto';
}
/**
 * OpenAI vision token estimator.
 *
 * - 'low' detail: flat 85 tokens.
 * - 'high'/'auto' detail (default): resize so the longest side is at most 2048,
 *   then so the shortest side is at most 768; tile the result by 512×512;
 *   total = 85 + 170 * tiles.
 */
export declare const visionTokens: ({ width, height, detail }: OpenAIVisionInput) => number;
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