“Grok 4 is at the point where it essentially never gets math/physics exam questions wrong, unless they are skillfully adversarial. It can identify errors or ambiguities in questions, then fix the error in the question or answer each variant of an ambiguous question. [@deedydas] Insane that Elon Musk has pulled it off again, absolutely crushing the AI wars with Grok 4. Summarizing the core announcements: — Post-training RL spend == pretraining spend — $3/M input told, $15/M output toks, 256k context, price 2x beyond 128k — #1 on Humanity’s Last Exam”