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VOICE MODEL GUIDE · SEPTEMBER 2026
GPT-Live-1
A practical guide to conversational voice AI
Understand full-duplex conversation, current API access, and where live voice fits your product.
- Full duplex
- Listen and speak together
- API available
- Since September 10, 2026
- Different workflows
- Live conversation · audio creation
01 / OVERVIEW
What is GPT-Live-1?
GPT-Live-1 is OpenAI's model for spoken conversation. Full duplex means it can process incoming speech while producing a response, so you can interrupt or add a detail without treating every exchange as a separate turn.
ChatGPT Voice is a finished product; the API is a way to build your own experience. Their access rules and supported features differ. This guide helps you choose which documentation to read and which workflow to test.
Original launch articleAt a glance
- Developer
- OpenAI
- Primary job
- Real-time voice conversation
- Ways to use it
- ChatGPT Voice or your own API application
- Current availability
- Check the official plan and API documentation
02 / HOW IT WORKS
How a live conversation works
The voice model manages the conversation. A separate backend can look up information or do deeper work, then return an answer for the voice model to explain.
YouSpeak naturally
GPT-Live-1Listen + speak
Backend agentReason + use tools
Delegate deeper work
A backend model or service handles the task it receives.
Bring the answer back
The voice model uses the result in its next response.
03 / CHOOSE A WORKFLOW
Choose the right audio workflow
Start with the result you need: a conversation that responds to you, or an audio file for something you are making.
01
Live conversation
A useful direction when speaking and responding are part of the task.
- Language practice: stop to ask what a word means.
- Hands-free planning: revise an idea as you talk.
- Voice support: clarify a question while a lookup runs.
02
Create an audio asset
A useful direction when you want to listen, revise, and use a finished clip.
- Narration for a product demonstration.
- Sound effects for a game or short video.
- Dialogue and ambience for a scene.
SeedAudio focuses on audio creation. This guide does not offer a GPT-Live conversation inside SeedAudio.
Explore SeedAudio examples04 / API ACCESS
API access, cost, and limits
AVAILABLE
Generally available since September 10, 2026
$0.05 / minute
OpenAI's voice-session rate, billed per second. Backend models and tools cost extra. This is not a SeedAudio plan price.
Model & pricingFor a browser application
- An OpenAI project with API access
- A browser and microphone
- A trusted server that keeps the API key private
ChatGPT subscriptions and API billing are separate. Check current features and account limits in the official documentation before building.
API release history05 / BEFORE YOU BUILD
What to test before you build
Use a short task from your own product. These are evaluation suggestions, not results from a SeedAudio GPT-Live integration.
Interruptions and quiet moments
Correct a detail midway through an answer. Pause to think. Check whether the conversation follows your intent.
Accents and background noise
Repeat the task with the languages, voices, and surroundings your users will actually bring.
Waiting for a backend answer
Ask a follow-up while a lookup is running. Check that the eventual answer matches your revised question.
Session limits and recovery
End the session, lose the connection, and start again. Make the next step clear without losing the task.
06 / FAQ
Frequently asked questions
Yes. OpenAI announced general API availability on September 10, 2026. See the official quickstart for current access requirements.
No. GPT-Live introduced a full-duplex conversation model. The older Advanced Voice Mode and current ChatGPT Voice options have different capabilities; check the Voice Help Center.
This is an independent educational guide. It links to OpenAI's services and documentation. The SeedAudio examples demonstrate our audio-creation workflow.
Choose according to the task. A live assistant needs to listen and respond during a session. A game effect or narration clip needs a brief, an output file, and a listening review.
Use the ChatGPT Voice Help Center for ChatGPT plans, and OpenAI's model page for API limits and pricing. Check the date and the access channel rather than applying launch-day details everywhere.
07 / RESOURCES
Go straight to the source
Facts checked September 23, 2026. OpenAI may update availability, prices, and limits. Start with its current documentation.
Looking for audio you can create and keep?
Listen to SeedAudio's examples, read the briefs, and plan your own scene.
Explore SeedAudio