Promptfoo: To Test and Evaluate LLM Responses, AI Agents, and RAG Applications
Summary : Learn that you can use Promptfoo to test and evaluate Large Language Models (LLMs) responses, AI agents, and Retrieval-Augmented Generation (RAG) applications. This guide explains traditional software testing versus AI evaluation, Promptfoo's core components, assertion types, installation, configuration, and how to run your first evaluation. Introduction: Why AI Applications Need a Different Testing Approach Traditional software testing has well-established techniques for validating application behavior. You provide an input, execute the application, and compare the actual output with the expected result. This approach works well for deterministic systems, such as REST APIs, database operations, and conventional business logic. AI-powered applications introduce a different set of challenges. An LLM may express the same answer in several ways, an AI agent may select an unexpected tool, and a Retrieval-Augmented Generation (RAG) application may produce a convincing an...