He's so gorgeous. I think he would be considered a red metallic dragon - I don't know for sure but if you search that on Google you find lots of similar fish.
Someone correct me if I'm wrong but I think the very metallic bettas can end up with scaled over eyes (like their shiny "coating" spreads over their eyes) which makes them blind. Your fish looks perfectly fine, not saying it's even going to happen, but it's something to be aware of if you ever see his eyes looking silver like the rest of him. And lots of people have kept happy, healthy blind bettas.