OpenAI Releases GPT-Realtime-2.1 and GPT-Realtime-2.1-mini for Low-Latency Voice Agents in the API

Summary

<p>OpenAI added two Realtime models to its API. GPT-Realtime-2.1-mini is a mini reasoning model for voice, priced like the earlier gpt-realtime-mini. OpenAI also cut p95 latency by at least 25% through improved caching. Here is what changed, how pricing compares, and how to connect over WebRTC.</p> <p>The post <a href="https://www.marktechpost.com/2026/07/06/openai-gpt-realtime-2-1-mini-reasoning-realtime-api/">OpenAI Releases GPT-Realtime-2.1 and GPT-Realtime-2.1-mini for Low-Latency Voice Agents in the API</a> appeared first on <a href="https://www.marktechpost.com">MarkTechPost</a>.</p>