import { modelContextSizes } from './model-context-sizes';
export type SupportedModelName = keyof typeof modelContextSizes;
/**
 * A type guard that checks if a particular model's context size is available from this package.
 *
 * @param modelName - A model name as used in LangChain.js.
 */
export declare const isModelSupported: (modelName: string) => modelName is SupportedModelName;
/**
 * Gets the context window size in tokens for the model.
 *
 * @param modelName - The supported model name as used in LangChain.js.
 */
export declare const getModelContextSize: (modelName: SupportedModelName) => number;