It could definitely use more improvement, but it looks nice.
It's hard to know SCP-178-1s appeareances in the first place since the article does not detail much, but if it's going for 'arthropod' look, maybe you could start by making the body a lot more "segmented" but tighly packed and kinda "swollen", like insects usually do. Pherpaps some color markings lal over their bodies and shapes, It's also missing the extra pair of arms.
My main concern is the lenght of the legs, they seem too short. Here's a few extracts from the SCP Foundation article to give a few ideas.
Subject states it walks using both its legs and upper appendages. Subject equates Entity 2’s gait to that of a gorilla “if someone put its skeleton together wrong”.
That is something that it's probably best to ignore, since there would be the need of new animations if this happened.
Subject 1 states that there is an entity “about a foot” in front of her, and that the entity’s head is “about two feet” taller than her.
This part is specially weird since it's saying that the entity's head is 60 centimeters taller than her, not than her head. It makes it super hard to visualize, i'm supposing she's saying they're plenty taller than a human, hunched over, and with a head about two or three times larger than a human's head; of course we can ignore this and go for the generally-arthropod look, or making them really tall-skinny-ish. Pherpaps similar to a grasshopper? Looking for grasshopper-man in google yielded weird but interesting results.
Try reading the article carefully, it's hard to find details on a 178-1 instance's appareance but they're there and they give a few hints. There's always room for improvement.