OpenAI GPT-Live-1 supports outbound calls to regular phones via SIP
Original headline오픈AI GPT-Live-1, SIP로 일반 전화 발신 지원
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OpenAI has made its GPT-Live-1 voice API generally available with SIP support, letting developers connect AI voice agents to ordinary phone numbers through SIP carriers. Launch partners include Telnyx and Twilio, with Ozonetel also confirmed as a supporting provider, while external carriers handle PSTN connectivity and OpenAI manages voice processing and session logic. The SIP pathway joins existing WebRTC and WebSocket transports, extending the API beyond browser-based calling. The move matters because it lets businesses deploy AI voice agents over the legacy telephone network without rebuilding their telephony stacks. What to watch next is adoption among contact centers and whether more SIP carriers are added.
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Named in this story
OpenAI, GPT-Live-1, Twilio (TWLO), Telnyx, Ozonetel
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