Developer notes on the Realtime API | OpenAI Developers

What this post added

This post details the General Availability (GA) launch of the Realtime API and the `gpt-realtime` speech-to-speech model. It highlights API shape changes, including a migration from beta to GA interfaces, and details new features such as image input, long context support (up to 60 minutes session duration, 32,768 token window), asynchronous function calling with placeholder responses, EU data residency options, and hosted prompts. It also introduces conversation idle timeouts with server-side VAD, configurable truncation settings for long conversations (including a cache-friendly retention ratio), and improved tracing events. The post also discusses changes to temperature parameter behavior and the introduction of sideband connections for WebRTC and SIP.