If pressing the right-side Option key opens Claude instead of starting dictation in Monologue, Claude and Monologue are usually listening for the same shortcut.
Monologue currently defaults its recording shortcut to the right-side Option key, so a conflict can happen if Claude is also set to use that same key.
How to fix it
You can fix this in either of these ways:
Change Claude's shortcut if you want to keep Monologue on its default shortcut.
Change Monologue's shortcut if you want Claude to keep using the right-side Option key.
If you use Claude often, changing Monologue is usually the better long-term fix because it stops both apps from competing for the same key.
Option 1: Change Claude's shortcut
Open Claude.
Open Claude's Settings.
Find the shortcut that is using the right-side Option key.
Change it to a different shortcut that does not conflict with Monologue.
Test Monologue again.
Option 2: Change Monologue's shortcut
Open Monologue.
Go to Settings > General > Shortcuts.
Click the current Recording shortcut.
Press a new shortcut that is not already used by Claude or another app.
Test the new shortcut where you want to dictate.
Common replacement shortcuts
Fn
Right Command
Control + Option
If it still doesn't work
Make sure Claude and Monologue are not set to the same shortcut.
Try a shortcut that is less likely to be claimed by another app.
If you keep seeing conflicts, contact support and include which shortcut each app is using.