# OpenAI WebRTC Audio Session, now with document context > Source: > Published: 2026-06-12 23:53:04+00:00 [OpenAI WebRTC Audio Session, now with document context](https://tools.simonwillison.net/openai-webrtc) Last month OpenAI [introduced a brand new model](https://openai.com/index/advancing-voice-intelligence-with-new-models-in-the-api/) to that API called [GPT‑Realtime‑2](https://developers.openai.com/api/docs/models/gpt-realtime-2), which they promoted as "our first voice model with GPT‑5‑class reasoning" - with a Sep 30, 2024 knowledge cut-off. I've been waiting for that model to show up in the ChatGPT iPhone app but it still hasn't, so I revisited my old playground. You can now pick the better model, and you can also paste in a big chunk of document context so you can have as audio conversation in your browser about whatever information you think would be useful to explore in a conversational way. Tags: [audio](https://simonwillison.net/tags/audio), [tools](https://simonwillison.net/tags/tools), [ai](https://simonwillison.net/tags/ai), [openai](https://simonwillison.net/tags/openai), [generative-ai](https://simonwillison.net/tags/generative-ai), [llms](https://simonwillison.net/tags/llms), [multi-modal-output](https://simonwillison.net/tags/multi-modal-output), [webrtc](https://simonwillison.net/tags/webrtc)