According to a recent blog post, the rep required to create a new tag has been raised to 1500. Most of the documentation explaining rep has not yet been updated. I just updated the FAQ question which explains rep; however, the FAQs are still out of date. SO and MSO both show 500 as the required rep; SU and SF both still show 100. Can we get an update to the FAQs please?
The FAQs are already correct, as the change to 1500 reputation required applies to only Stack Overflow.
Stack Overflow FAQ:
1500 Create new tags