PyLLMut—pronounced "Pill Moot" (/pɪl muːt/)—is
a research-based LLM-driven mutant generator library
for Python. It uses Large Language Models (LLMs) as its backend to
generate mutants for a given Python module.
The current version of PyLLMut
supports only gpt-4o-mini through its API.
We plan to add support for more models,
such as DeepSeek.
Full documentation is available at PyLLMut Documentation.
To install PyLLMut, follow the instructions in the Installation Guide.
For a quick example of how to use PyLLMut, refer to the Quick Start Guide.
For details on PyLLMut's available API, refer to the API Reference.
PyLLMut is a research-based project, inspired by the study On the Use of Large Language Models in Mutation Testing, which was originally for Java.