---
title: "init(_:scale:judge:scoringMode:prompt:)"
framework: evaluations
role: symbol
role_heading: Initializer
path: "evaluations/modeljudgeevaluator/init(_:scale:judge:scoringmode:prompt:)"
---

# init(_:scale:judge:scoringMode:prompt:)

Creates a single-metric evaluator with a custom judge prompt.

## Declaration

```swift
init(_ name: String, scale: ScoringScale, judge: any LanguageModel, scoringMode: ScoringMode = .discrete, prompt: ModelJudgePrompt<Input>)
```

## Parameters

- `name`: The metric name that corresponds to the DataFrame column.
- `scale`: The scoring scale for this metric.
- `judge`: The language model to use as judge.
- `scoringMode`: A value that indicates whether scores are discrete (default) or allow any floating-point value.
- `prompt`: Configuration for the judge prompt, including instructions, response presentation, and reference.

## See Also

### Creating a single-dimension evaluator

- [init(_:scale:judge:scoringMode:)](evaluations/modeljudgeevaluator/init(_:scale:judge:scoringmode:).md)