Verified API status
Is the GPT-Live API available?
The GPT-Live-1 API is not generally available. OpenAI currently provides a form to be notified when it becomes available. Developers who need production realtime voice should use the documented GPT-Realtime-2.1 family instead.
Last verified:
GPT-Live-1 API: notification only
The official page says to sign up for a notification when GPT-Live-1 becomes available in the API. It does not publish access instructions, a model ID, pricing, or API documentation.
Open the official notification formCodex Voice does not open the GPT-Live API
The July 23 desktop integration lets eligible users direct Codex tasks through ChatGPT Voice. It does not publish a GPT-Live-1 API model ID, endpoint, pricing contract, or API-key access.
Understand GPT-Live in CodexCurrent Realtime API model choices
Prices are per one million tokens and were verified on the official model pages.
| Model | Text input / cached / output | Audio input / cached / output | Context / max output |
|---|---|---|---|
| gpt-realtime-2.1 | $4 / $0.40 / $24 | $32 / $0.40 / $64 | 128k / 32k |
| gpt-realtime-2.1-mini | $0.60 / $0.06 / $2.40 | $10 / $0.30 / $20 | 128k / 32k |
Choose a transport
| Transport | Use it for | Practical rule |
|---|---|---|
| WebRTC | Browser and mobile clients | Recommended for direct client audio; issue ephemeral credentials from your server |
| WebSocket | Server-side agents and controlled media pipelines | Keep standard API keys on trusted infrastructure |
| SIP | Phone numbers, contact centers, and telephony | Verify incoming webhooks and design explicit transfer or hang-up tools |
A migration-safe path
Ship with a documented model
Use gpt-realtime-2.1 for quality and reasoning, or mini when latency and cost dominate.
Separate model configuration
Keep the model ID, voice, reasoning effort, prompt, tools, and cost limits outside core product logic.
Wait for an actual GPT-Live API contract
Migrate only after OpenAI publishes official access, model IDs, pricing, modalities, limits, and docs.
GPT-Live API FAQ
Does the form grant GPT-Live-1 API access?
No. Its current wording is a notification signup, not an API key, beta enrollment confirmation, or general-availability announcement.
Which Realtime model should I use?
Start with gpt-realtime-2.1 when quality and complex tool use matter. Evaluate gpt-realtime-2.1-mini when lower price and faster responses are more important.
Can the Realtime models accept video?
No. Their official model pages list text, audio, and image input; text and audio output; and no video support.