GPT-Live-1 API: Full-duplex voice agents that listen and speak at the same time
OpenAI's new voice model handles interruptions, noise, telephony, and delegation to a back-end reasoning model.
GPT-Live-1 is a full-duplex API voice model that listens and speaks simultaneously, handles interruption, lets developers steer tone and pace, supports telephony, and delegates reasoning or tool calls to a back-end text model.
Best for: Teams building customer service, scheduling, voice assistants, or phone workflows that need more natural turn-taking.Points for a team pilot
What changed
Instead of coordinating separate speech-to-text, reasoning, and text-to-speech stages, developers can use one voice model for conversational timing and select a back-end model or agent for deeper work.
Availability and limits
OpenAI says GPT-Live-1 has been available in the API since September 10. Custom voices require a sales request and eligibility review. Voice and language options will continue expanding, so Thai quality must be verified in the target account and environment.
Implications for Thai organizations
Start with repeatable calls and a clear route to a person. Measure false interruption, Thai names, reference numbers, domain vocabulary, and real acoustic conditions. Do not use overseas customer claims as a Thai benchmark.
Dates and evidence
The announcement and API availability date is September 10, 2026. No separate source-update date was found.
Before getting started
- Give notice and obtain consent for recording
- Provide a human-escalation path
- Test Thai names, numbers, and terminology
- Restrict consequential tool calls
- Measure end-to-end latency
Frequently asked questions
Is Thai fully supported?
The announcement says language and accent choices are expanding but does not guarantee every Thai scenario. Test with your own voices and vocabulary.
Should it confirm transactions autonomously?
Financial or sensitive actions should be read back, explicitly approved, and able to escalate to a person.
Sources used for verification
Vendor facts are separated from TechTouch guidance. Features, pricing, and commercial terms may change, so confirm the latest information at the time of purchase.