OpenAI’s GPT-6 Astra aces Korean exam, sparks AGI debate

Days after OpenAI released GPT-6 Astra on September 3, the model's rapid accumulation of headline-grabbing achievements — from acing South Korea's college entrance exam to autonomously completing a 3D puzzle game — has reignited debate over whether artificial general intelligence has arrived.

From Exams to Video Games

An analysis posted to GitHub on Sunday showed that GPT-6 Astra earned a perfect 450 on the 2026 College Scholastic Ability Test (CSAT), making it the first AI model to achieve a flawless score across all tested subjects, including Korean language, English, mathematics, Korean history and four electives. The model did so using 357,000 tokens, fewer than any publicly evaluated competitor. GPT-5.6 placed second with 448.5 points while using 429,000 tokens. Lee Seung-hyun, an adjunct professor at Hanyang University, said the advance lies not in raw intelligence but in Astra's ability to retain and compress prior reasoning steps. "It means that rather than thinking harder each time, it continued with what it had already figured out before," Lee said.koreatimes

Separately, an AI enthusiast known as CozyBlaze demonstrated Astra playing through the entirety of Valve's Portal over roughly 24 hours, controlling the game via Model Context Protocol commands while receiving screenshots between moves. The run required 3,336 tool calls and cost $571.18 in API tokens, though CozyBlaze noted the expense was covered by a $200 Codex Pro subscription. The experiment drew scrutiny over whether the model had been exposed to Portal walkthroughs during training — a near certainty, commenters noted, given the game's popularity.tomshardware

AGI Claims Draw Pushback

Nvidia ↗ 0.90% CEO Jensen Huang amplified the moment on Saturday, writing on X that Astra was "trained on over 100,000 NVIDIA Grace Blackwell NVL72 units" and declaring, "AGI has arrived". Huang had made similar claims as recently as March, and analysts suggested his remarks served partly to underscore Nvidia's central role in AI infrastructure. NYU professor Gary Marcus promptly disputed the claim, arguing that Astra lacks evidence meeting conventional AGI definitions.chosun+2

The tension deepened Sunday when OpenAI chief scientist Jakub Pachocki published an essay titled "An Alien Mind," warning that "no one is prepared for the consequences of a continued rapid rise in machine intelligence" and calling for voluntary slowdowns across the industry. OpenAI CEO Sam Altman shared the post on X, calling it "important".benzinga+1

Markets React

Investor enthusiasm was immediate in Asia. South Korea's KOSPI surged 4.6 percent on Monday to a five-week high, driven by foreign and institutional buying. Samsung Electronics jumped 5.68 percent and SK hynix ↗ 1.92% soared 8.26 percent as traders bet that Astra-class models will accelerate memory chip demand. "Investor sentiment was stoked by OpenAI's new Astra, which could open up the AGI era," said Kang Jin-hyuk, a senior analyst at Shinhan Securities.yna