---
title: "init(value:expectations:)"
framework: evaluations
role: symbol
role_heading: Initializer
path: "evaluations/modelsampleoutput/init(value:expectations:)"
---

# init(value:expectations:)

Creates a model sample output with an optional expected value and expectations.

## Declaration

```swift
init(value: Value? = nil, expectations: Expectation? = nil)
```

## Parameters

- `value`: The expected output value for comparison.
- `expectations`: The expected behavior, such as a tool-call trajectory.

## Discussion

Discussion let output = ModelSampleOutput<String, TrajectoryExpectation>(value: "Paris", expectations: nil)