Fish Audio just launched S2.1 Pro, a new voice AI model positioned as a serious competitor to ElevenLabs. Its biggest advantage is cost. Depending on the ElevenLabs model used for comparison, Fish Audio can be nearly 5 times cheaper while also being built on an open-weight foundation. In this demo, the system handles multiple speakers, interruptions, changing requests, name spelling, and a longer conversation without losing track of the order. It shows how quickly voice AI is becoming more capable, accessible, and affordable for developers. The real test will be whether Fish Audio can match ElevenLabs in voice quality, reliability, latency, and production performance.