Power BI June update adds Copilot web modeling preview
Microsoft published the Power BI June 2026 feature summary on June 9, 2026. The update includes Copilot in web modeling in preview, Fabric Apps for semantic models in preview, DAX user-defined functions generally available, and several generally available reporting improvements. The post makes clear that the release mixes preview and generally available features.
Report builders are under pressure to move faster, but the hardest part of a trusted report is still the model: measure definitions, semantic model changes, and the logic other people reuse. A Copilot pane can speed up edits, but it can also make unreviewed model changes easier to miss. The June update brings more work into the browser and gives teams reusable DAX functions as first-class model objects. That is useful only if the team treats generated or reused logic as something to approve, document, and test before it lands in a board pack.
Analysis
Pick one shared metric and turn it into a documented DAX function or review checklist before trying Copilot web modeling on a live semantic model. The win is reusable logic, not faster unreviewed edits.
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