Lesson 2014 of 2116
AI Realtime APIs: Voice-In, Voice-Out at Conversation Speed
New realtime APIs handle audio in and out without round-tripping through text.
Lesson map
What this lesson covers
Learning path
The main moves in order
- 1The premise
- 2realtime-api
- 3speech
- 4latency
Concept cluster
Terms to connect while reading
Section 1
The premise
OpenAI Realtime, Gemini Live, and similar process audio directly — under 500ms response — enabling real conversations.
What AI does well here
- Hold a fluid voice conversation under 1s latency.
- Interrupt and be interrupted naturally.
- Hear tone and emotion in your voice.
- Switch languages mid-conversation if asked.
What AI cannot do
- Match human listening accuracy in noisy rooms.
- Handle complex multi-speaker calls reliably yet.
Key terms in this lesson
End-of-lesson quiz
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