In the rapidly advancing field of artificial intelligence, OpenAI launched its latest real-time API on October 1, 2023, aimed at providing developers with powerful tools to build intelligent voice applications. The release of this API garnered widespread attention, especially during the OpenAI DevDay in Singapore, where engineers from Daily.co shared their experiences and lessons learned while using this API. These engineers not only built products using the real-time API but also actively contributed to open source.