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Chariot speech to text (ASR) turns spoken audio into text. It is built for English and Indian languages, including speech that mixes the two in one sentence. You transcribe over a streaming WebSocket: It accepts microphone, telephony, and recorded audio, and handles sessions of up to three hours. See the quickstart.

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Model

You can omit model_type. See Models.

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What you can control

Streaming sessions take these options on the connection URL. Each one is fixed for the session. See Languages, modes, and styles and Audio formats.

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What you get back

A streaming session sends transcript.delta events with new text as it is recognized, then one transcript.done event with the complete transcript. Transcripts are plain text. Word-level timestamps, confidence scores, and speaker labels are not part of the response.

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Cost

Speech to text costs 1.5 credits per second of audio (90 credits per minute). Streaming bills the audio you send, not the time the connection is open. See Credits & pricing.

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History

Every streaming session is saved to your workspace with its transcript, settings, and cost. List them with GET /v1/asr/sessions. See Session history.

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Next steps

Quickstart

Stream a file and get a transcript in a few minutes.

Streaming WebSocket

The full real-time protocol.

Audio formats

Sample rates, telephony audio, and chunk sizes.

Session history

Look up past sessions and their transcripts.