We shipped user experience improvements and fixes to make it easier for developers to build reliable AI apps. We added function calling to the prompt playground, which allows users to experiment with OpenAI functions. The release notes highlight several other improvements, including persistent resized widths in the experiment column, fixing libraries including Autoevals to work with OpenAI's new libraries, and adding support for function calling and tools in the prompt playground. Braintrust is an enterprise-grade stack for building AI products, aiming to reduce uncertainty and tedium in incorporating AI into businesses. The platform offers various features such as evaluations, prompt playground, and data management, and invites developers to sign up now or check out their pricing page.