import { MODELS } from "./models.generated.js";
import type { Api, KnownProvider, Model, Usage } from "./types.js";
export type ModelRegistryChangeEvent = {
    type: "added";
    provider: string;
    model: Model<Api>;
};
/**
 * Subscribe to registry mutations performed by the discovery layer
 * (newly-published model ids). Returns an unsubscribe function.
 */
export declare function onModelRegistryChange(listener: (e: ModelRegistryChangeEvent) => void): () => void;
type ModelApi<TProvider extends KnownProvider, TModelId extends keyof (typeof MODELS)[TProvider]> = (typeof MODELS)[TProvider][TModelId] extends {
    api: infer TApi;
} ? (TApi extends Api ? TApi : never) : never;
export declare function getModel<TProvider extends KnownProvider, TModelId extends keyof (typeof MODELS)[TProvider]>(provider: TProvider, modelId: TModelId): Model<ModelApi<TProvider, TModelId>>;
export declare function getProviders(): KnownProvider[];
export declare function getModels<TProvider extends KnownProvider>(provider: TProvider): Model<ModelApi<TProvider, keyof (typeof MODELS)[TProvider]>>[];
export declare function calculateCost<TApi extends Api>(model: Model<TApi>, usage: Usage): Usage["cost"];
/**
 * Check if a model supports xhigh thinking level.
 *
 * Supported today:
 * - GPT-5.2 / GPT-5.3 / GPT-5.4 / GPT-5.5 model families
 * - Opus 4.6 models (xhigh maps to adaptive effort "max" on Anthropic-compatible providers)
 */
export declare function supportsXhigh<TApi extends Api>(model: Model<TApi>): boolean;
/**
 * Check if two models are equal by comparing both their id and provider.
 * Returns false if either model is null or undefined.
 */
export declare function modelsAreEqual<TApi extends Api>(a: Model<TApi> | null | undefined, b: Model<TApi> | null | undefined): boolean;
export {};
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