April 2026 Release Notes

🔗 Explicit Variable Referencing: Connect Your Variables with Confidence

Brim already supports multi-level variables, where one variable can serve as an input to another. Now you can make those connections explicit.

With Explicit Variable Referencing, you can reference a variable's value directly in another variable's instructions. This means you can tell Brim exactly how to use an input variable, removing ambiguity, reducing errors, and getting better abstraction results.

This is especially useful when:

• You have a variable whose output feeds into a downstream calculation or classification
• You want to make the relationship between variables visible and unambiguous in the instructions
• You want to specify in AI Variable Creation or AI Dependent Variable Creation that you want to use a specific existing variable.
• You're troubleshooting why a downstream variable isn't performing as expected

To use it, open any variable's instructions and type an open curly bracket “{“ to see a list of variables you can reference. Type more to filter the list, and select one to use it. Learn more in our documentation.

📋 CathPCI Variables Now in the Brim Library

The Variable Library now includes a CathPCI bundle with pre-built variables for the ACC's CathPCI Registry. Add them to any project in a single click.

To browse the new bundle, go to Settings → Variable Library, or use the Add Variables menu in Project Setup and select "Add from Library."

Have a registry or variable bundle you'd like to see added? Reply to this email or send suggestions to support@brimanalytics.com.

🧬 Customer Requests

There is nothing we love more at Brim than working with researchers and abstractors on what would make their work smoother and easier. This month, we’re thrilled to deliver several features based on your requests to us, including:

• Add token counts to label generation & history
• Import Data via TSV
• A new generation option for only new patient-variable combinations
• Allow filtering label tables by Validation Agreement status
• An “Accept All” option for label tables.

Keep them coming! If you have a request, please reach out to support@brimanalytics.com or reply to one of these emails - we’d love to learn more.

Also in this Release

• Support for OpenAI gpt-5-mini
• Add MRN filter to Variable value list page
• Variable setting for "use default value in aggregation"
• Project cloning supports variable match rules
• Keep user-defined variable names through REDCap import and Automatic Variable/DV Generation
• Generation History grouped by Generation, and with more helpful error messages.
• Option to add prefilter as an index choice for variables.
• Auto reload on Project Setup when adding notes, validation data, or variables.

✨ How to Get the Latest Brim Version

This version is called:

2026.04.29

You can check your current version in Settings → About.