benchrOpenAI
OpenAI API — Developer API
Schema-guaranteed output, transcription with speaker separation, and a realtime speech-to-speech session protocol.
Developer API Vendor page read September 1, 2026 developers.openai.com
What you can do with it
- Constrain a response to a JSON Schema so a required key is never missing and an enum value is never invented.
- Transcribe audio, with a separate model that returns speaker-attributed output and another that returns word-level timestamps.
- Run a live voice session over WebRTC, WebSocket or SIP on gpt-realtime-2.1.