Update Nova-3 Keyterms Mid-Stream
Swap in the vocabulary for each step of a call without reconnecting. To replace a Nova-3 stream’s keyterms during a /v1/listen session, send a keyterms array in a Configure message:
Each keyterms array replaces the whole list, including keyterms set with the keyterm query parameter, and an empty array [] clears them. The 500-token keyterm limit that applies to the keyterm query parameter also applies to each update; an over-limit update returns an Error and leaves the stream’s keyterms unchanged. The same message can also turn formatting features on or off, for example "features": { "numerals": true }.
Mid-stream keyterms work on every Nova-3 streaming model, including monolingual languages, multilingual (language=multi), and Nova-3 Medical, and they behave the same as keyterms set when you open the stream. Updating Nova-3 keyterms with Configure on /v1/listen is available on the global endpoint (api.deepgram.com). It isn’t available yet on the EU (api.eu.deepgram.com), Australia (api.au.deepgram.com), or India (api.in.deepgram.com) regional endpoints. Sending keyterms on another model returns an Error with code KeytermsNotSupported, and the stream continues with its previous settings.
The /v1/listen API reference now documents the Configure message.