> For the complete documentation index, see [llms.txt](https://docs.mindee.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mindee.com/getting-started/defining-a-model.md).

# Defining a Model

Build your model from a prebuilt template or create one from scratch using a sample document.

## From a Model Template

Chances are, there is already a model template that at least partly fits your needs.

Click on Catalog to check the model templates, and when clicking on one of them, you'll create a new model based on the template.

You now have your own model, you can start testing it immediately.

If you need to make adjustments, use the "Data Schema" tab as explained in more detail in: [Models Overview](/models/models-overview.md#modifying-your-data-schema).

For instance, here is a demo of how to create a model from the Invoice model template:

{% @supademo/embed url="<https://app.supademo.com/demo/cmieehzyjar67b7b4lf5tgvrb>" demoId="cmieehzyjar67b7b4lf5tgvrb" %}

## From Scratch

If you don't find something that matches your needs in the catalog, you also have the possibility to click on **Create Custom Model.**\
\
You'll have two possibilities :

* upload a sample document
* write the document type

Our AI Agent will then create a custom model for you.\
\
You now have a model with a **custom** schema that you can modify, using the "Data Schema" tab as explained in more detail in: [Models Overview](/models/models-overview.md#modifying-your-data-schema).\
\
Here is a tutorial that shows how to create a custom model by filling in the document type and by uploading a sample doc.

{% @supademo/embed url="<https://app.supademo.com/demo/cmiem2hsob2x5b7b4ye1il6a8>" demoId="cmiem2hsob2x5b7b4ye1il6a8" %}


---

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