# maximum(_:) Enforces a maximum value. ``` static func maximum(_ value: Decimal) -> GenerationGuide ``` ## Discussion Use a `maximum` generation guide — whose bounds are inclusive — to ensure the model produces a value less than or equal to some maximum value. For example, you can specify that the highest level a character in your game can achieve is 99.9: ```swift @Generable struct GameCharacter { @Guide(description: "A creative name appropriate for a fantasy RPG character") var name: String @Guide(description: "A level for the character", .maximum(99.9)) var level: Decimal } ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)