GrowthBook 4.1 builds on the previous version by introducing key Enterprise features such as Holdouts and Experiment Dashboards, while enhancing AI integration and MCP server capabilities. Holdout experiments enable long-term impact analysis by maintaining a control group, and Experiment Dashboards allow for customized experiment views to facilitate insights sharing. The release enhances AI-driven functionalities, including automated result summarization and SQL assistance, and updates the MCP Server for seamless experiment creation within AI coding tools. Additionally, GrowthBook is now integrated natively in the Vercel Marketplace, offering streamlined feature flagging and A/B testing for Vercel projects. The update also supports pre-computed dimensions for efficient queries, introduces support for the open-source FerretDB as a MongoDB alternative, and offers integration with Sanity CMS for content variation testing. With over 150 commits, this release emphasizes user feedback and sets the stage for future developments.