Interim Results

Deepgram, Speechmatics, and Soniox. Other engines ignore this parameter.

Controls whether the server sends partial (non-final) transcripts as speech is processed.

wss://api.telnyx.com/v2/speech-to-text/transcription?interim_results=true

Default: false. Pass "true" as a string. interim_results=false (default) — Server sends only final transcripts. Each message has is_final: true. Lower message volume, higher latency per result.

{"transcript": "Hello, how are you?", "is_final": true, "confidence": 0.98}

interim_results=true — Server sends evolving partial transcripts as audio is processed, followed by a final. Partials have is_final: false and are replaced by the next message.

{"transcript": "Hello", "is_final": false, "confidence": 0.0}
{"transcript": "Hello, how", "is_final": false, "confidence": 0.0}
{"transcript": "Hello, how are you?", "is_final": true, "confidence": 0.98}

Partial transcripts have confidence: 0.0 — confidence is only meaningful on final results.

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Interim Results