Langtail 1.0

LLM testing made easy with a spreadsheet-like interface. Score tests with natural language, pattern matching, or code. Optimize LLM apps by experimenting with models, parameters, and prompts. Gain insights from test results and analytics.

Langtail 1.0 is a low-code platform designed to simplify testing for AI applications, particularly those using large language models (LLMs). Its intuitive, spreadsheet-like interface allows users to score tests using natural language, pattern matching, or custom code. Teams can experiment with models, parameters, and prompts to optimize performance while gaining actionable insights from test results and analytics. Langtail supports all major LLM providers, including OpenAI and Anthropic, and offers self-hosting for enhanced security. With a TypeScript SDK and OpenAPI integration, it caters to both technical and non-technical users, enabling collaboration across product, engineering, and business teams. Langtail ensures robust testing, helping catch issues before deployment and improving AI app reliability.