Libr-AI/OpenFactVerification
Open-source pipeline that automates fact-checking of LLM outputs by extracting claims, searching for evidence, and verifying factual accuracy.

Loki dissects long texts into individual claims, determines which claims warrant verification, generates search queries to crawl for supporting evidence, and ultimately verifies each claim’s factual accuracy. It leverages OpenAI’s API for claim extraction and evaluation, and uses search APIs like Serper for evidence retrieval. The tool targets journalists, researchers, and anyone needing to validate the reliability of information, directly addressing hallucination detection in language model outputs.
Frequently asked
- What is Libr-AI/OpenFactVerification?
- Open-source pipeline that automates fact-checking of LLM outputs by extracting claims, searching for evidence, and verifying factual accuracy.
- Is OpenFactVerification open source?
- Yes — Libr-AI/OpenFactVerification is open source, released under the MIT license.
- What language is OpenFactVerification written in?
- Libr-AI/OpenFactVerification is primarily written in Python.
- How popular is OpenFactVerification?
- Libr-AI/OpenFactVerification has 1.1k stars on GitHub.
- Where can I find OpenFactVerification?
- Libr-AI/OpenFactVerification is on GitHub at https://github.com/Libr-AI/OpenFactVerification.