Vapi has introduced two new features: Assistant Overrides and Variables, which allow users to create more dynamic and personalized voice assistants by reusing existing assistants with custom variables. This feature enables the creation of tailored voice experiences without starting from scratch. Additionally, Vapi's Call Logs feature provides detailed information about each call, enabling users to debug issues, identify performance bottlenecks, track end-to-end latency, and optimize their assistant's response time. These features aim to make voice assistants more efficient and engaging for users.