Phoenix

Arize Phoenix is an open-source ML observability and LLM tracing platform designed for data scientists and ML engineers who need real-time visibility into their AI applications. It enables users to instrument, experiment, and optimise large language models, computer vision models, and tabular machine learning models directly within notebook environments like Jupyter. Phoenix provides a vendor-agnostic, framework-neutral approach to monitoring AI systems without vendor lock-in, making it accessible for teams of any size. The tool help end-to-end visibility from model inputs through inference outputs, allowing users to identify performance issues, debug model behaviour, and evaluate LLM responses before deployment.