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Yival

YiVal is an Apache-2.0-licensed Python framework for automating prompt engineering and working with configured experiments for generative-AI applications. Its README documents a CLI workflow that uses a YAML configuration and an OpenAI-backed generator to create test data.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Yival — OpenViST project profile in AI Developer Tools & SDKs.
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Understand the project

Practical overview

When it fits

Use YiVal during GenAI application development when you want to configure prompt-related experiments or generate test examples through its CLI.

Who it is for

  • Developers building or refining generative-AI applications
  • Teams that want to generate test examples from configured prompts

Documented uses

  • Generate example datasets for testing a GenAI application
  • Explore prompt variations and application configurations through experiments
Before you choose

Requirements & limits

  • The documented dataset-generation example requires Python 3.10 or later and an OpenAI API key.
  • The README provides pip and Docker installation paths, plus Poetry setup for development.
  • The documented example writes its generated dataset to a CSV file.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Generate a small test dataset with YiVal

Create a CSV dataset of three generated landing-page headlines using a configured OpenAI prompt generator.

Before you start

  • Python 3.10 or later
  • An OpenAI API key available as the OPENAI_API_KEY environment variable
  • YiVal installed with pip, or an installed repository environment

Steps

  1. Install YiVal with pip install yival, or follow the repository's Poetry development setup.

  2. Create the documented YAML configuration for a machine-generated dataset, specifying an OpenAI prompt data generator, the input function, three examples, and generated_examples.csv as the output path.

  3. From the /YiVal/src/yival directory, run yival run config_data_generation.yml.

Expected outcome

The documented example writes generated test examples to generated_examples.csv.

Guide limitations

  • The example requires an OpenAI API key and specifies gpt-4.
  • The example generates data; it does not document evaluation or deployment.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
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14 October 2026
Original website title
YiVal/YiVal · Official homepage title · retained in its source language
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