# init(_:samples:targetCount:sessionProvider:samplingStrategy:validator:) Creates a generator for custom, generable evaluation samples. ``` init(_ prompt: Prompt, samples: [SampleType], targetCount: Int, sessionProvider: (@Sendable () -> LanguageModelSession)? = nil, samplingStrategy: SampleGenerator.SamplingStrategy? = .random(), validator: (nonisolated(nonsending) @Sendable (SampleType) async throws -> Bool)? = nil) where SampleType : Generable ``` ## Parameters `prompt` The prompt the generator sends to the language model session. `samples` The initial set of evaluation samples that provide context. `targetCount` The total number of samples in the resulting dataset. `sessionProvider` A closure that creates a new language model session. `samplingStrategy` The strategy for selecting example samples. `validator` An optional closure that decides whether a generated sample is valid. --- 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)