A new AI service enables real-time conversations with digital twins at a latency of less than one second. Startup Tavus has developed this technology, as founders Hassaan and Quinn report on HackerNews. Their goal was to enable the most natural communication possible between humans and computers. Numerous technical challenges had to be overcome to achieve the low latency. The response time of the language model and the precise detection of the end of speech proved to be the main problems. Through optimizations, Tavus was able to reduce the latency from 3-5 seconds to less than one second. The system now allows hours-long conversations with digital twins and is already being used by initial customers.