Is ONE PIECE episode 692 filler?
Canon No, episode 692 of ONE PIECE is canon.
#692
The Struggle with Pica – Zoro's One Finishing Move
奮闘とのピーカ ゾロ一とどめの一撃
Aired 10 May 2015
Mochibayo compiled this list from MyAnimeList's labels, because MyAnimeList's episode data is not reaching us at the moment.