Phoenix Arize is an innovative, open-source AI observability platform tailored for optimizing language model (LLM) applications. Built on the robust foundation of OpenTelemetry, it offers a vendor, framework, and language-agnostic environment, ensuring unparalleled flexibility for developers. The platform provides comprehensive insights and visibility into the inner workings of AI applications, allowing for thorough tracing and evaluation. Geared towards early-stage developers, Phoenix Arize supports pre-deployment assessment and troubleshooting directly from a local machine, facilitating a streamlined development process. Whether you're fine-tuning models or diagnosing issues, Phoenix Arize empowers users with the tools needed to enhance AI performance efficiently.