GET
/v1/schemas/openai/chat/realtime/transcription_sessions?kind=output
Accept:
| field | recorded source |
|---|---|
| schema | Source linked above. upstream-spec Source trace3f115c72cf761f250dffef5a1bd0e50d58f35e9e0b9415901622880fdbca3418{
"fetchedAt": 1793250606,
"extractorVersion": "1",
"verifiedAt": null
} |
Response body
5 properties · 1 required · 1 $defs| property | type | description | constraints |
|---|---|---|---|
| client_secret* | object | Ephemeral key returned by the API. Only present when the session is created on the server via REST API. | |
| modalities | any | The set of modalities the model can respond with. To disable audio, set this to ["text"]. | |
| input_audio_format | string | The format of input audio. Options are `pcm16`, `g711_ulaw`, or `g711_alaw`. | |
| input_audio_transcription | AudioTranscription | ||
| turn_detection | object | Configuration for turn detection. Can be set to `null` to turn off. Server VAD means that the model will detect the start and end of speech based on audio volume and respond at the end of user speech. |
Types
1 $defsAudioTranscriptionobject
| model | string | enum | The model to use for transcription. Current options are `whisper-1`, `gpt-transcribe`, `gpt-live-transcribe`, `gpt-4o-mini-transcribe`, `gpt-4o-mini-transcribe-2025-12-15`, `gpt-4o-transcribe`, `gpt-4o-transcribe-diarize`, and `gpt-realtime-whisper`. Use `gpt-… | |
| language | string | The language of the input audio. Supplying the input language in [ISO-639-1](https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes) (e.g. `en`) format will improve accuracy and latency. | |
| languages | string[] | Possible languages of the input audio, in [ISO-639-1](https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes) format. Supported by `gpt-transcribe` and `gpt-live-transcribe`. | items ≥ 1 |
| keywords | string[] | Words or phrases to guide transcription of the input audio. Supported by `gpt-transcribe` and `gpt-live-transcribe`. | |
| prompt | string | An optional text to guide the model's style or continue a previous audio segment. For `whisper-1`, the [prompt is a list of keywords](https://developers.openai.com/api/docs/guides/speech-to-text#prompting). For `gpt-4o-transcribe` models (excluding `gpt-4o-tra… | |
| delay | enum | Controls how long the model waits before emitting transcription text. Higher values can improve transcription accuracy at the cost of latency. Only supported with `gpt-realtime-whisper` in GA Realtime sessions. | minimal | low | medium | high | xhigh |
Validate a payload
before you spend tokensshell
$ curl -X POST https://modelschemas.com/v1/validate \
-d '{"provider":"openai","endpointId":"realtime/transcription_sessions","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}