In October 2024, OpenAI unveiled the Realtime API, empowering developers to integrate low-latency, multimodal interactive experiences into their applications. Since its inception, this API has been widely adopted by developers, successfully embedding natural speech-to-speech capabilities into various applications and services. Most recently, OpenAI has announced the launch of GPT-realtime, its most sophisticated speech-to-speech model to date. GPT-realtime excels at executing intricate instructions with heightened precision, boasts a reduced error rate when invoking tools, and produces speech that is remarkably natural and expressive.