--- title: OpenAI GPT-Live Now Available for Telnyx Voice AI Assistants canonical: https://telnyx.com/release-notes/openai-gpt-live-voice-ai-assistants --- # OpenAI GPT-Live Now Available for Telnyx Voice AI Assistants [Release notes](https://telnyx.com/release-notes) # OpenAI GPT-Live Now Available for Telnyx Voice AI Assistants ### 30, Sep 2026 OpenAI GPT-Live (`openai/gpt-live-1`) is now available in Telnyx Voice AI Assistants. GPT-Live is OpenAI's full-duplex speech-to-speech model: it listens and speaks at the same time, so callers can interrupt mid-sentence and the conversation keeps its rhythm. Telnyx provides the phone number, the call, and the tool layer around it. ### What's new * **OpenAI GPT-Live model:** Select `openai/gpt-live-1` as the model for a Voice AI Assistant in Mission Control. * **Bring your own OpenAI key:** GPT-Live requires your OpenAI API key, added to Telnyx as an integration secret. OpenAI bills the GPT-Live session to your OpenAI account, and your Telnyx call and platform usage stays on your Telnyx account. * **Speech-to-speech calls:** Call audio streams to OpenAI over a WebSocket, so the conversation itself does not pass through separate STT and TTS steps. * **OpenAI Live voices:** The Voice tab lists OpenAI Live voices for GPT-Live assistants, with `marin` as the default. * **Delegation for reasoning and tools:** GPT-Live handles the conversation and hands reasoning and tool calls to a delegation model. Your assistant's tools, MCP servers, call transfers, and hangups keep working through delegation. * **Current limits:** GPT-Live assistants use OpenAI Live voices only, cannot use a fallback model, and cannot be combined with workflows. * **Direct SIP option:** To run GPT-Live from your own backend instead of a Telnyx assistant, the GPT-Live SIP guide shows how to route a Telnyx number straight to OpenAI over encrypted SIP and control the session from your application. ### Why it matters * GPT-Live handles turn-taking and barge-in inside the model, so callers can interrupt and talk over the agent without breaking the conversation. * GPT-Live cannot call tools on its own. Delegation routes that work through the Telnyx tool stack, so an assistant can look up records, transfer a call, or trigger a webhook mid-conversation. * The phone number, call routing, assistant configuration, and tools stay in one Telnyx system, with OpenAI as the model provider on your own key. ### Example use cases * Inbound support lines where callers talk over the agent and expect it to stop and listen. * Appointment booking and scheduling calls that need natural turn-taking. * Call flows that pair a fast conversational front end with tool-heavy back-end lookups, such as order status or account changes. ### Getting started 1. Log in to the [Telnyx Mission Control Portal](https://portal.telnyx.com/). 2. Add your OpenAI API key as an integration secret. 3. Navigate to AI → Assistants and create a new assistant or select an existing one. 4. On the Agent tab, set the model to `openai/gpt-live-1` and select your OpenAI API key secret. 5. On the Voice tab, choose an OpenAI Live voice. 6. Save the assistant and place a test call. **Learn more** in the [Voice Assistant quickstart](https://developers.telnyx.com/docs/inference/ai-assistants/no-code-voice-assistant), the [OpenAI GPT-Live model page](https://developers.openai.com/api/docs/models/gpt-live-1), or the [Telnyx GPT-Live SIP guide](https://developers.telnyx.com/docs/voice/sip-trunking/gpt-live-configuration-guide). [Start building](https://telnyx.com/sign-up) ### Ask AI * [![GPT](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/chatgpt_icon-ea55e09d.jpeg?width=92&format=webp)](https://chat.openai.com/?q=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.) * [![Claude](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/claude_icon-c7c8eef3.webp?width=92&format=webp)](https://claude.ai/new?q=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.) * [![Perplexity](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/perplexity_icon-cd5b74f1.webp?width=92&format=webp)](https://www.perplexity.ai/search?q=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.) * [![Gemini](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/gemini_icon-4ff1cbf4.webp?width=92&format=webp)](https://www.google.com/search?udm=50&aep=11&q=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.) * [![Grok](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/grok_icon-e588e5bd.webp?width=92&format=webp)](https://x.com/i/grok?text=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.)