Speech models

Dialogflow voice agents use Speech-to-Text for speech recognition, which is included in Dialogflow pricing. Dialogflow automatically selects a speech recognition model for you, but you can optionally specify the model.

Available models

All available models are listed at Speech-to-Text models. Select a model that is best suited to your domain and supports your agent language and speech features.

If a model is not explicitly specified, then Dialogflow auto-selects a model based on the audio configuration in API requests and agent settings.

The following models typically have the best performance:

• telephony_short (best for telephony Dialogflow)
• telephony (best for Agent Assist) (also good for telephony Dialogflow when advanced timeout-based end of speech sensitivity is enabled)
• phone_call (good for Agent Assist and telephony Dialogflow)
• latest_short (best for non-telephony Dialogflow)
• command_and_search (best for languages where other models are not available)

Specify a model

You can supply the model for an agent, flow, or page with the model selection setting.

You can also supply the model when calling the Sessions.detectIntent or Sessions.streamingDetectIntent methods; Go to the Session API reference

or when configuring the ConversationProfile for Agent Assist. Specifying the model in a detect intent or conversation profile API call will override any model selections applied to the agent, flow, or page, unless you enable the Override request-level speech model setting.