Can I claim an 18-year-old?

my son turned 18 in October. He lives with me full-time and is a full-time student. He does have a part-time job. there is one special circumstance. I received death benefits up until his 18th birthday, which I will claim but now the death benefit comes to him via SSI. The total benefit will be around $4500 for the rest of this year. Does he need to file on that or can I claim him?