# Levels

## List levels

List the available level of authors proficiencies.

<table><thead><tr><th width="215.58101723822637">Name</th><th>Description</th></tr></thead><tbody><tr><td><code>premium</code></td><td>The <code>premium</code> level is handled by experienced native speakers and is best for general business writing and translation. This level makes it possible to order additional options, including Extra Proofreading and Graphic Files.</td></tr><tr><td><code>enterprise</code></td><td>The <code>enterprise</code> level is handled by professionals in their field and is best for complex projects requiring an advanced writing style, research and adaptation. This level makes it possible to order additional options, including Extra Proofreading and Graphic Files.</td></tr></tbody></table>

{% hint style="info" %}
**Tips:** Please note that the `premium` level is called `standard` on the application.
{% endhint %}

{% hint style="success" %}
**Tips:** TextMaster recommend using the `enterprise` level to guarantee the best translation quality possible.
{% endhint %}

Note that not all levels are available for all kinds of project. For example, `enterprise` level is not available for proofreading projects at all.

For some complex languages (translation from Norwegian to Swahili, for example), on the contrary, the only available level will be `enterprise`.

Attempting to create a project with unavailable level will result in an error. You should check the response from the [Create a project](https://developer.textmaster.com/projects#create-a-project) endpoint for such errors.