Anthropic's AI assistant, Claude 3.5 Sonnet, has received significant updates, including the ability to analyze PDFs, perform precise mathematical calculations, and create dashboards from user-provided files such as spreadsheets. The new features enhance Claude's functionality, allowing users to construct prompts using a 'Lego Prompting' technique, which enables modular prompt construction for various analytical and creative tasks. Additionally, a custom prompt-style feature is in development, allowing users to create tailored prompts for different scenarios, moving beyond the previous limitation of three preset options.