# 13334: Gather: Invalid model value

Log Type: APPLICATION

Log Level: WARNING

## Description

This warning occurs when `<Gather>` receives a `speechModel` value that Twilio does not support, or when the selected language and model combination is not supported. When that happens, Twilio generates an error notification and the gather fails.

### Possible causes

* The `speechModel` value is not one of the supported `Gather` model values.
* The selected language is not supported for the chosen model.
* A specific STT model was selected with a language and model combination Twilio does not support.

### Possible solutions

* Set `speechModel` to a supported value documented for `<Gather>`.
* If you use a specific STT model, verify that the language and model combination is supported before you retry.
* Review the resulting error notification to confirm which model value Twilio rejected.

#### Additional resources

* [TwiML Voice: `<Gather>`](/docs/voice/twiml/gather)
* [Error and Warning Dictionary](/docs/api/errors)