Strapi 5 introduces several new features and improvements to the leading open-source headless CMS. These include simplified API responses, introduction of documents for efficient grouping and management of content, use of documentId instead of id in API calls, enhanced TypeScript support, changes in creating entries while uploading files, new functions for Document Service API, and a new Plugin SDK for creating plugins. Additionally, Strapi 5 now uses Vite as its module bundler and has an AI-based chatbot on the documentation page.