OpenAI ships gpt-realtime-2.1 and gpt-realtime-2.1-mini with 25% lower latency

OpenAI·medium signal

OpenAI released gpt-realtime-2.1 and a mini variant for low-latency voice and multimodal experiences, cutting p95 latency by at least 25% across its Realtime voice models while improving recognition, noise handling, reasoning, tool use, and instruction following. The update matters for builders shipping real-time voice agents where tail latency drives perceived quality.