AoO for weapon of 1 size larger

[BlackSeed_Vash]

My Fighter, a half-elf, has the Monkey Grip Feat (CW) and is using a Large Greatsword. Is my threated area range 5ft or 10ft; or something in between?

 

[Yeoman]

It's 5'. I think that was addressed in the last sage advice article, but maybe someone can confirm that?

 

[Caliban]

My Fighter, a half-elf, has the Monkey Grip Feat (CW) and is using a Large Greatsword. Is my threated area range 5ft or 10ft; or something in between?

It's still 5'. Greatswords don't increase your natural reach, no matter what size they are.