export declare function inferOpenAiCompatibleBiller(env: NodeJS.ProcessEnv, fallback?: string | null): string | null;
/** Managed Responses routes use their own credentials and prices, including
 * no-auth endpoints. Absence of OPENAI_API_KEY never makes them ChatGPT plans. */
export declare function resolveManagedOpenAiBilling(routing: unknown): {
    provider: string;
    biller: string;
    billingType: "api";
} | undefined;
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