See theCloud Speech
documentationfor 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.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["# Google Cloud Dialogflow Cx V3 Client - Class SpeechModelVariant (0.8.1)\n\nVersion latestkeyboard_arrow_down\n\n- [0.8.1 (latest)](/php/docs/reference/cloud-dialogflow-cx/latest/V3.SpeechModelVariant)\n- [0.8.0](/php/docs/reference/cloud-dialogflow-cx/0.8.0/V3.SpeechModelVariant)\n- [0.7.2](/php/docs/reference/cloud-dialogflow-cx/0.7.2/V3.SpeechModelVariant)\n- [0.6.0](/php/docs/reference/cloud-dialogflow-cx/0.6.0/V3.SpeechModelVariant)\n- [0.5.2](/php/docs/reference/cloud-dialogflow-cx/0.5.2/V3.SpeechModelVariant)\n- [0.4.1](/php/docs/reference/cloud-dialogflow-cx/0.4.1/V3.SpeechModelVariant)\n- [0.3.4](/php/docs/reference/cloud-dialogflow-cx/0.3.4/V3.SpeechModelVariant)\n- [0.2.1](/php/docs/reference/cloud-dialogflow-cx/0.2.1/V3.SpeechModelVariant)\n- [0.1.1](/php/docs/reference/cloud-dialogflow-cx/0.1.1/V3.SpeechModelVariant) \nReference documentation and code samples for the Google Cloud Dialogflow Cx V3 Client class SpeechModelVariant.\n\nVariant of the specified [Speech\nmodel](/php/docs/reference/cloud-dialogflow-cx/latest/V3.InputAudioConfig#_Google_Cloud_Dialogflow_Cx_V3_InputAudioConfig__getModel__) to use.\n\nSee the [Cloud Speech\ndocumentation](https://cloud.google.com/speech-to-text/docs/enhanced-models)\nfor which models have different variants. For example, the \"phone_call\" model\nhas both a standard and an enhanced variant. When you use an enhanced model,\nyou will generally receive higher quality results than for a standard model.\n\nProtobuf type `google.cloud.dialogflow.cx.v3.SpeechModelVariant`\n\nNamespace\n---------\n\nGoogle \\\\ Cloud \\\\ Dialogflow \\\\ Cx \\\\ V3\n\nMethods\n-------\n\n### static::name\n\n### static::value\n\nConstants\n---------\n\n### SPEECH_MODEL_VARIANT_UNSPECIFIED\n\n Value: 0\n\nNo model variant specified. In this case Dialogflow defaults to\nUSE_BEST_AVAILABLE.\n\nGenerated from protobuf enum `SPEECH_MODEL_VARIANT_UNSPECIFIED = 0;`\n\n### USE_BEST_AVAILABLE\n\n Value: 1\n\nUse the best available variant of the Speech model that the caller is eligible for.\n\nGenerated from protobuf enum `USE_BEST_AVAILABLE = 1;`\n\n### USE_STANDARD\n\n Value: 2\n\nUse standard model variant even if an enhanced model is available. See the\n[Cloud Speech\ndocumentation](https://cloud.google.com/speech-to-text/docs/enhanced-models)\nfor details about enhanced models.\n\nGenerated from protobuf enum `USE_STANDARD = 2;`\n\n### USE_ENHANCED\n\n Value: 3\n\nUse an enhanced model variant:\n\n- If an enhanced variant does not exist for the given [model](/php/docs/reference/cloud-dialogflow-cx/latest/V3.InputAudioConfig#_Google_Cloud_Dialogflow_Cx_V3_InputAudioConfig__getModel__) and request language, Dialogflow falls back to the standard variant.\n\nThe [Cloud Speech\ndocumentation](https://cloud.google.com/speech-to-text/docs/enhanced-models)\ndescribes which models have enhanced variants.\n\nGenerated from protobuf enum `USE_ENHANCED = 3;`"]]