OpenAI quietly rolls out Bidi 1, a bidirectional voice model for ChatGPT that listens while speaking

OpenAI ChatGPT 语音最大规模升级：双向AI语音模型 Bidi 1 已上线测试

Some users already see Bidi 1 in ChatGPT's web and app model selector, sitting alongside Standard and Advanced Voice. Selecting it turns the voice bubble yellow. The key change is full-duplex: the model can keep listening while it speaks and respond immediately to interruptions. In a demo, a user asked it to count from 1 to 10, interrupted mid-way and told it to count backwards—it complied instantly. OpenAI hasn't announced a launch date; one outlet speculates a wider rollout this week. The post doesn't disclose pricing, regional availability, or a firm timeline.

Why it matters: A substantive upgrade to OpenAI's voice capabilities — full-duplex with interrupt response is something Advanced Voice Mode couldn't do. Only partial rollout and no official announcement yet, so not pushing past 90. But the interaction change is significant enough for featured.