LLMTest

LLMTest is an open-source, MIT-licensed Python library designed to facilitate robust testing of Large Language Models (LLMs). It integrates seamlessly with pytest, allowing developers to apply familiar software testing methodologies to their AI outputs. The tool provides a comprehensive set of assertions for text, performance, and agent behavior, enabling validation of LLM responses without relying on LLM judges or complex YAML configurations. This library is built for developers working with LLMs from providers like OpenAI, Anthropic, and Ollama, as well as DeepSeek, Gemini, and Mistral. It's particularly useful for ensuring the reliability, accuracy, and efficiency of AI agents and their interactions. By offering deterministic and instant assertions, LLMTest helps reduce testing costs and speeds up the development cycle, making it easier to build and deploy high-quality LLM-powered applications.