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OpenAI Realtime API
Voice infrastructure / API| Pricing | Token-based. gpt-realtime-2.1: audio $32 in / $64 out per 1M tokens; gpt-realtime-2.1-mini: audio $10 in / $20 out per 1M. gpt-live-1 voice sessions $0.05/min (backend model usage extra). |
|---|---|
| Per-minute price | gpt-live-1: $0.05/min; realtime models billed per token |
| Free tier | not public |
| Key features | Speech-to-speech models; WebRTC/WebSocket/SIP; tool calling |
| Best for | Developers building speech-to-speech agents directly |
| Website | https://developers.openai.com/api/docs/pricing |
| Date checked | 2026-10-16 |
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