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OpenAI Voice / Realtime

S tier

ChatGPT's voice + the Realtime API for developers.

Open OpenAI Voice / Realtime →Compare with alternatives

Kai's verdict

S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.

Strengths

  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT

Weaknesses

  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in

Best for

Voice chat users, developers building voice agents on OpenAI.

Pricing

Voice included with ChatGPT Plus; Realtime API by usage

Alternatives worth knowing

ElevenLabs
S
The voice gold standard. Cloning + TTS + dubbing.
Cartesia
S
Ultra-low-latency voice. Built for realtime agents.
Hume AI
A
Voice AI that reads + expresses emotion.