/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
export declare const DEFAULT_GEMINI_MODEL = "gemini-2.5-pro";
export declare const DEFAULT_GEMINI_FLASH_MODEL = "gemini-2.5-flash";
export declare const DEFAULT_GEMINI_FLASH_LITE_MODEL = "gemini-2.5-flash-lite";
export declare const DEFAULT_GEMINI_EMBEDDING_MODEL = "gemini-embedding-001";
/**
 * Returns true if the model string indicates a Gemini 2.x model.
 */
export declare function isGemini2Model(model: string): boolean;
/**
 * Returns true if the model string indicates a Gemini 3.x model.
 */
export declare function isGemini3Model(model: string): boolean;