Variant of the specified [Speech model][google.cloud.dialogflow.v2.InputAudioConfig.model] to use.
See the Cloud Speech
documentation
for which models have different variants. For example, the "phone_call" model
has both a standard and an enhanced variant. When you use an enhanced model,
you will generally receive higher quality results than for a standard model.
No model variant specified. In this case Dialogflow defaults to
USE_BEST_AVAILABLE.
UseBestAvailable
Use the best available variant of the [Speech
model][InputAudioConfig.model] that the caller is eligible for.
Please see the Dialogflow
docs for
how to make your project eligible for enhanced models.
UseEnhanced
Use an enhanced model variant:
If an enhanced variant does not exist for the given
[model][google.cloud.dialogflow.v2.InputAudioConfig.model] and request language, Dialogflow falls
back to the standard variant.
If the API caller isn't eligible for enhanced models, Dialogflow returns
an error. Please see the Dialogflow
docs
for how to make your project eligible.
UseStandard
Use standard model variant even if an enhanced model is available. See the
Cloud Speech
documentation
for details about enhanced models.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThis page details the \u003ccode\u003eSpeechModelVariant\u003c/code\u003e enum within the \u003ccode\u003eGoogle.Cloud.Dialogflow.V2\u003c/code\u003e namespace, used to specify speech model variants in Dialogflow.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of \u003ccode\u003eSpeechModelVariant\u003c/code\u003e is 4.26.0, with numerous previous versions also documented, ranging back to version 3.2.0.\u003c/p\u003e\n"],["\u003cp\u003eThere are four fields available under this enum: \u003ccode\u003eUnspecified\u003c/code\u003e, \u003ccode\u003eUseBestAvailable\u003c/code\u003e, \u003ccode\u003eUseEnhanced\u003c/code\u003e, and \u003ccode\u003eUseStandard\u003c/code\u003e, each with its own specific behavior for speech model selection.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eUseEnhanced\u003c/code\u003e allows for access to enhanced speech model variants if available and if the caller is eligible, with a fallback to standard models if no enhanced model exists or caller is not eligible.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eUseBestAvailable\u003c/code\u003e allows for the use of the best available variant of the speech model, while \u003ccode\u003eUseStandard\u003c/code\u003e will always use the standard variant, even when enhanced models are available.\u003c/p\u003e\n"]]],[],null,[]]
