export declare const MODEL_COST_PRICING_SNAPSHOT: {
    readonly checkedAt: "2026-09-14";
    readonly currency: "USD";
    readonly unit: "1M tokens";
    readonly sources: readonly ["https://developers.openai.com/api/docs/pricing", "https://developers.openai.com/api/docs/models/gpt-6-astra", "https://developers.openai.com/api/docs/models/gpt-5.6-sol", "https://developers.openai.com/api/docs/models/gpt-5.6-terra", "https://developers.openai.com/api/docs/models/gpt-5.6-luna", "https://platform.claude.com/docs/en/about-claude/pricing"];
    readonly assumptions: readonly ["OpenAI Standard pricing; requests above 272,000 total input/cache tokens use 2x input/cache and 1.5x output pricing.", "Anthropic Standard pricing with the 5-minute cache-write rate; Fast, Batch, Flex, regional, tool, and subscription charges are excluded.", "variant and serviceTier are separate; model variants do not alter the selected Standard token price.", "gpt-5.6-luna-fast has no published model page; its rates are the resolved host model catalog entry for openai/gpt-5.6-luna-fast, exactly twice the Luna Standard schedule. That entry declares no separate long-context band, so the shared OpenAI band above is applied rather than a second assumed schedule."];
};
export interface ModelCostUsage {
    readonly providerID: string | undefined;
    readonly modelID: string | undefined;
    readonly uncachedInputTokens: number | undefined;
    readonly cacheReadTokens: number | undefined;
    readonly cacheWriteTokens: number | undefined;
    readonly outputTokens: number | undefined;
    readonly reasoningTokens: number | undefined;
    readonly serviceTier?: string;
}
export type ModelCostEstimate = {
    readonly status: "priced";
    readonly usd: number;
    readonly longContext: boolean;
    readonly priceKey: string;
} | {
    readonly status: "unpriced";
    readonly reason: "missing-usage" | "unknown-model" | "unsupported-service-tier";
};
/** Pure request-level estimate. Unknown identities and incomplete usage never become synthetic zero cost. */
export declare function estimateModelUsageCost(usage: ModelCostUsage): ModelCostEstimate;