AI voice calls — realtime speech to speech

Have a live voice conversation with realtime speech-to-speech models. Pick a model and a voice, talk naturally, interrupt mid-sentence, and read both sides of the transcript afterwards.

• Models include OpenAI gpt-realtime and gpt-realtime-mini plus other speech-to-speech providers.
• Barge in mid-sentence; the model stops and listens like a phone call.
• Calls route through LLM Gateway for unified billing and usage tracking.

See the live model catalogue for current availability and pricing.