GPT-Live
GPT-Live is a family of full-duplex voice models developed by OpenAI for continuous spoken interaction.
Speech & Audio AI
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GPT-Realtime / OpenAI Realtime API
GPT-Realtime is a family of speech-to-speech models exposed through the OpenAI Realtime API, a low-latency interface that lets developers build voice agents which take spoken audio in and return spoken audio…
GPT-Transcribe
GPT-Transcribe (gpt-transcribe) and GPT-Live-Transcribe (gpt-live-transcribe) are two closed-weight speech-to-text models that OpenAI added to its API on July 28, 2026.
OpenAI Realtime API
The OpenAI Realtime API is a speech-to-speech interface from OpenAI that lets developers build low-latency, bidirectional voice AI applications powered by GPT-4o and later by the purpose-built gpt-realtime…
Voice Engine (OpenAI)
Voice Engine is a speech-generation and voice-cloning model developed by OpenAI that can produce natural-sounding speech resembling a specific person from a single audio sample as short as 15 seconds.
Whisper
Whisper is an open-source family of automatic speech recognition (ASR) models developed by OpenAI and first released on September 21, 2022.