OpenAI Realtime API
OpenAI's voice-agent API
Overview
The Realtime API exposes OpenAI's GPT-4o voice models for low-latency speech-to-speech voice agents — handles interruption, tool use, function calling in voice. Pay-per-minute pricing. Popular as a base for voice-agent platforms.
Use cases
ASEAN Perspective
OpenAI Realtime API in Southeast Asia
ASEAN-region availability and pricing notes coming soon. Drop the editorial team a note via /contact/ if you can supply local context (Singapore/Malaysia/Indonesia/Thailand/Vietnam).
The Realtime API is OpenAI's low-latency, speech-to-speech interface for building natural voice agents, streaming audio in and out over WebRTC or WebSockets with native function calling and interruption handling. It is among the best foundations available for conversational voice apps, avoiding the lag and brittleness of stitching separate STT, LLM and TTS services.
It suits developers building voice assistants, phone agents and live interactive experiences. Caveats: per-minute audio pricing can get expensive at scale, the realtime/WebSocket programming model is more complex than a simple REST call, and you are tied to OpenAI's models and voices. Documentation and SDKs are strong. Global service with no SEA data residency; English-led but multilingual capable.
About this listing
This entry was compiled from publicly available data including OpenAI Realtime API's official website, press releases, documentation, and reputable third-party publications. RECATOOLS is not affiliated with OpenAI Realtime API unless explicitly stated.
Third-party AI tools update their pricing, features, availability, and policies frequently. Information here may be outdated by the time you read this — we make reasonable efforts to keep listings current, but cannot guarantee absolute accuracy.
For the latest details, please refer to OpenAI Realtime API directly →
Spotted something out of date? Suggest an update →
Alternatives to OpenAI Realtime API
More in Video & Audio
