> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://help.sigmacomputing.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://help.sigmacomputing.com/_mcp/server.

# What's new in Sigma

> Sigma release notes for Apr 3, 2026: New model used for Snowflake AI provider, forms, and more.

## AI

### New model used for Snowflake AI provider

If you use a warehouse-hosted AI provider with a Snowflake connection, and your Snowflake account is hosted on AWS, Sigma now uses `claude-sonnet-4-5` as the LLM.

For more details, see [Configure a warehouse-hosted model as AI provider](https://help.sigmacomputing.com/docs/configure-warehouse-ai-model-integration).

## AI apps

### Forms (GA)

Use the form element to create a clear interface for user data entry. Create a form manually, or based on an existing input table or stored procedure.

Forms can submit data to multiple data sources at the same time, and trigger action workflows at the time of submission, allowing you to centrally manage user input in AI apps.

For more information, see [Use forms to streamline user data entry](https://help.sigmacomputing.com/docs/use-forms-to-streamline-user-data-entry).

## Functions and calculations

### System functions in custom SQL queries

You can use [system functions](https://help.sigmacomputing.com/docs/system-functions) with the `#formula` directive in custom SQL queries to return information about the current workbook context, such as user name, email, and time.

For more information, see [Write custom SQL](https://help.sigmacomputing.com/docs/write-custom-sql#reference-user-attributes-with-system-functions).

## Workbook elements

### Configure background images for charts (Beta)

You can now add background images to cartesian (bar, line, scatter, area, waterfall, box and whisker, and combo) charts in order to build more complex visualizations, such as heat maps, or to further customize your chart's appearance.

To set a background image, upload a file or specify an image URL. If you use a URL, you can configure a dynamic URL by pressing `=` to open the formula bar and entering a formula that references a control value or column.

See [Configure a custom background image for a chart](https://help.sigmacomputing.com/docs/customize-chart-background-and-style#configure-a-custom-background-image-for-a-chart-beta) for more information.

### Dynamic column aliases in custom SQL queries

You can use a control value to create a dynamic column alias in a custom SQL query using the `#identifier` directive. This allows you to set column names in response to workbook contents.

For more information, see [Reference workbook control values in SQL statements](https://help.sigmacomputing.com/docs/reference-workbook-control-values-in-SQL-statements#dynamically-set-column-aliases-in-SQL).

## Bug fixes

* Previously, image elements with the **Shape** set to **Circle** did not align properly with the element frame when choosing a **Horizontal** or **Vertical** alignment setting. Now, they follow the same behavior as other image elements.

* Previously, when downloading a workbook page with a tabbed container as a PNG or PDF, only the first tab in the container was exported. Now, the export renders the current selected tab. This change does not apply to scheduled exports.