> ## Documentation Index > Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # KeyBudgetResetInterval UTC window the spend is counted over (weeks start Monday); null for a lifetime budget that never resets. ## Example Usage ```typescript theme={null} import { KeyBudgetResetInterval } from "@openrouter/sdk/models"; let value: KeyBudgetResetInterval = "weekly"; // Open enum: unrecognized values are captured as Unrecognized ``` ## Values ```typescript theme={null} "daily" | "weekly" | "monthly" | Unrecognized ```