# init(prompt:expected:instructions:generationSchema:expectations:) Creates a model sample with string-based prompt and instructions. ``` init(prompt: String, expected: ExpectedValue? = Optional(nilLiteral: ()), instructions: String? = nil, generationSchema: GenerationSchema? = nil, expectations: TrajectoryExpectation? = nil) ``` --- 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)