OpenAI Launches Bidi 1: Two-Way Voice Model with Real-Time Interruption Support

On June 23, users discovered that ChatGPT quietly launched Bidi 1, a new two-way voice model. Available in the model selector alongside standard and advanced voice modes, its breakthrough feature is real-time 'listen while speaking' — users can interrupt mid-conversation with new instructions. This marks a shift from turn-taking to natural simultaneous conversation. No official announcement yet; wider testing expected this week. A strong response to Google Gemini Live and Anthropic Claude Voice.