A new generation of voice models for natural human-AI interaction, now powering ChatGPT Voice.
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GPT-Live enables continuous voice interaction with AI, using a turnless speech model and low-latency architecture for faster, more natural conversations.
GPT‑Live‑1 brings natural, full-duplex voice conversations to the API, with stronger instruction following, custom voices, and telephony support.
Tolan built a voice-first AI companion with GPT-5. 1, combining low-latency responses, real-time context reconstruction, and memory-driven personalities for natural conversations.
We’re releasing a more advanced speech-to-speech model and new API capabilities including MCP server support, image input, and SIP phone calling support.
Retell AI is transforming the call center with AI voice automation powered by GPT-4o and GPT-4. 1.