There are at least two bands with the name 'Opus 5':

1) Opus 5 were a progressive jazz/rock fusion band from Quebec, Canada, active in the 1970s.

2) Opus 5 is a jazz quintet featuring Seamus Blake, Alex Sipiagin, David Kikoski, Boris Koslov and Donald Edwards. They have so far release three albums, all on the Criss Cross Jazz label:

2011 - Introducing Opus 5
2012 - Pentasonic
2014 - Progression Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.