Amazon Q Developer CLI now integrates Claude Sonnet 4, enhancing developers' workflows with advanced coding and reasoning capabilities at no extra cost. The new model excels in coding tasks, offering features like bug fixing, running bash commands, and providing immediate feedback, while users can easily select their preferred model within the CLI. A practical demonstration showcases Claude Sonnet 4's ability to create a sophisticated Python to-do list application with robust error handling and documentation generation.

Amazon Q Developer has introduced Model Context Protocol (MCP) support in its IDE plugins for Visual Studio Code and JetBrains, enhancing context-aware workflows by integrating external tools. This allows developers to streamline tasks, such as managing Jira issues and accessing Figma designs, directly from the IDE without manual context switching. By utilizing MCP, Q Developer can automatically fetch relevant details and execute complex multi-tool tasks efficiently.