Is my cactus dead?

it looks like its growing to me

>>2328178
It's growing, the spines turn golden as it ages. Maybe put it somewhere with more sunlight though, it's growing kinda weirdly.

>>2328178
It's definitely not dead, but it's not doing too hot. A couple of thoughts:

Is it in the right medium? It's important to have soil that's something like 50/50 sand/soil mix or something similar that drains really well. This is important because you should be watering it every two weeks during winter and every week for the rest of the year. I give mine 1/4 cup and it's 2" tall, you'll need to adjust a little bit since yours looks taller. Underwatering would certainly cause it to be droopy at the top - able to be bent, if that's what you mean.

Spines not forming properly could be a variety of things, but it probably is either insufficient light or insufficient fertilizer. Since it looks like you got it recently it probably is the light. So all things considered, working just off of this picture, my recommendation would be to re-pot it into a cactus soil mix and move it to an area with more light.

I'm not an expert, these are just my thoughts from taking care of mine for the past year.