Microsoft has updated Bing’s search interface, moving the Copilot search tab to the first position in the menu under the Bing search box. Along with this change, Microsoft also renamed the “All” tab to “Web.”
Microsoft relaunched Copilot Search in April, so this update may be part of that rollout. It also seems similar to how Google has placed AI Mode as the first tab in its search interface.
Here’s what the new layout looks like now:

Here is the old version:

I suspect this change is meant to highlight how important Copilot Search is becoming in Microsoft Bing’s overall strategy.
This update was first spotted by Sachin Patel, who shared it on X:
