We've been working on an exciting new feature at Braintrust and have shipped some user experience improvements and fixes this week. We added open source models like Mistral, Codellama, Llama2, etc. to the playground for comparison with OpenAI's new models using Perplexity's API. These new additions improve the speed of our platform. Additionally, we've made improvements such as selectors for diffing and comparison modes on experiment view and added support for new OpenAI models in the playground. Braintrust is an enterprise-grade stack for building AI products, offering solutions from evaluations to data management, aiming to reduce uncertainty and tedium in incorporating AI into businesses.