OpenAI’s new GPT-6 Astra became the first AI model to score a perfect 450 on the 2026 College Scholastic Ability Test evaluation, according to results posted on GitHub on Sunday. The model also used fewer tokens than other publicly available systems. OpenAI said the result was encouraging, while experts cautioned that standardized exam scores do not fully measure real-world AI ability.
A student fills out an OMR answer sheet during a September mock test for the 2027 College Scholastic Ability Test at Seoul Girls' High School in Mapo District, Seoul, Wednesday. Yonhap
An analysis showed OpenAI's new artificial intelligence (AI) model earned a perfect score on the College Scholastic Ability Test (CSAT) for the first time. While top-tier AI models have previously posted near-perfect scores, this result is drawing attention because it used fewer tokens than existing models.
According to results posted on GitHub on Sunday, OpenAI's new GPT-6 Astra was the only evaluated model to score a perfect 450 in the 2026 CSAT LLM Solution Log. The evaluation tested models on questions from the 2026 CSAT across Korean language, English, mathematics, Korean history and four elective subjects — Physics I, Chemistry I, Life Science I and Society and Culture — without internet access.
