Benas was the
2018 co-national champion in the 15–16 age division alongside
Isaiah Drake and
Justin Ah Chow. At the
2019 Winter Cup Benas won gold on rings and placed fourth in the all-around. In early 2020, Benas competed at the
2020 Winter Cup where he placed first in the all-around and on rings. The remainder of the competitions in 2020 were either canceled or postponed due to the global
COVID-19 pandemic. In November of that year Benas signed his
National Letter of Intent with the
Oklahoma Sooners.
2022–23 Benas became age-eligible for senior-level competition in 2022. He competed at the
2022 Winter Cup where he placed eleventh in the all-around. He competed at the
NCAA Championships where he helped Oklahoma finish second as a team. He was named College Gymnastics Association's
Rookie of the Year. After the end of the college season, Benas underwent shoulder surgery and spent the next few months recovering.
2024–25 Benas made his elite all-around return at the
2024 Winter Cup, where he placed sixth. As a result, he was added to the senior national team for the first time. Additionally Benas was selected to compete at the
DTB Pokal Mixed Cup in
Stuttgart alongside
Riley Loos,
Kai Uemura,
Addison Fatta,
Dulcy Caylor, and
Nola Matthews. While there, he helped the USA finish first as a team. At the
2024 NCAA Men's Gymnastics Championship, Benas helped Oklahoma finish third as a team. Individually he placed third in the all-around behind
Khoi Young and
Fred Richard. He was named CGA's
Gymnast of the Year. Benas next competed at the
2024 U.S. National Championships where he finished eleventh and was added to the national team. As a result he qualified to compete at the
2024 Olympic Trials where he ultimately finished sixth. Benas's injuries continued into 2025 as he had surgery on his thumb in January. In August he competed at the
2025 National Championships where he won bronze in the all-around behind
Asher Hong and
Fred Richard. ==Competitive history==