{"slug": "openai-gpt-live-now-available-for-telnyx-voice-ai-assistants", "title": "OpenAI GPT-Live Now Available for Telnyx Voice AI Assistants", "summary": "Telnyx has added OpenAI's GPT-Live full-duplex speech-to-speech model, openai/gpt-live-1, to its Voice AI Assistants, letting callers interrupt mid-sentence while the conversation continues. The model requires customers to supply their own OpenAI API key as an integration secret, with OpenAI billing the GPT-Live session and Telnyx billing the call and platform usage; call audio streams to OpenAI over a WebSocket, bypassing separate STT and TTS steps. GPT-Live assistants are limited to OpenAI Live voices (marin is the default), cannot use a fallback model, and cannot be combined with workflows, and GPT-Live cannot call tools on its own — reasoning and tool calls are handed to a delegation model so tools, MCP servers, call transfers, and hangups keep working.", "body_md": "[Contact us](https://telnyx.com/contact-us)\n\n[Log in](https://portal.telnyx.com)\n\nOpenAI 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.\n\n- **OpenAI GPT-Live model:** Select`openai/gpt-live-1` as the model for a Voice AI Assistant in Mission Control.\n- **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.\n- **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.\n- **OpenAI Live voices:** The Voice tab lists OpenAI Live voices for GPT-Live assistants, with`marin` as the default.\n- **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.\n- **Current limits:** GPT-Live assistants use OpenAI Live voices only, cannot use a fallback model, and cannot be combined with workflows.\n- **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.\n\n- GPT-Live handles turn-taking and barge-in inside the model, so callers can interrupt and talk over the agent without breaking the conversation.\n- 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.\n- The phone number, call routing, assistant configuration, and tools stay in one Telnyx system, with OpenAI as the model provider on your own key.\n\n- Inbound support lines where callers talk over the agent and expect it to stop and listen.\n- Appointment booking and scheduling calls that need natural turn-taking.\n- Call flows that pair a fast conversational front end with tool-heavy back-end lookups, such as order status or account changes.\n\n1. Log in to the [Telnyx Mission Control Portal](https://portal.telnyx.com/) .\n2. Add your OpenAI API key as an integration secret.\n3. Navigate to AI → Assistants and create a new assistant or select an existing one.\n4. On the Agent tab, set the model to `openai/gpt-live-1` and select your OpenAI API key secret.\n5. On the Voice tab, choose an OpenAI Live voice.\n6. Save the assistant and place a test call.\n\n**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).", "url": "https://wpnews.pro/news/openai-gpt-live-now-available-for-telnyx-voice-ai-assistants", "canonical_source": "https://telnyx.com/release-notes/openai-gpt-live-voice-ai-assistants", "published_at": "2026-09-30 12:00:00+00:00", "updated_at": "2026-09-30 22:49:04.544308+00:00", "lang": "en", "topics": ["ai-products", "large-language-models", "ai-agents", "developer-tools"], "entities": ["Telnyx", "OpenAI", "GPT-Live", "openai/gpt-live-1", "Telnyx Voice AI Assistants", "Telnyx Mission Control"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/openai-gpt-live-now-available-for-telnyx-voice-ai-assistants", "markdown": "https://wpnews.pro/news/openai-gpt-live-now-available-for-telnyx-voice-ai-assistants.md", "text": "https://wpnews.pro/news/openai-gpt-live-now-available-for-telnyx-voice-ai-assistants.txt", "jsonld": "https://wpnews.pro/news/openai-gpt-live-now-available-for-telnyx-voice-ai-assistants.jsonld"}}