validationFile

@SerialName(value = "validation_file")
val validationFile: FileId? = null

The ID of an uploaded file that contains validation data.

If you provide this file, the data is used to generate validation metrics periodically during fine-tuning. These metrics can be viewed in the fine-tuning results file. The same data should not be present in both train and validation files.

Your dataset must be formatted as a JSONL file. You must upload your file with the purpose fine-tune. See the /docs/guides/fine-tuning for more details.