Elon Musk introduces Grok 4, positioning it as a major jump in real-world AI capability. He highlights multi-agent reasoning (“Grok 4 Heavy”), near-perfect scores on tough exam suites, and massive scale-ups in data and compute. The demo leans on practical use: solving math and research tasks, browsing sources to price odds, running physics visualizations, and automating workflows—while promising sharper multimodal tools and faster, more natural voice. Musk frames the goal as maximally truth-seeking AI that can help invent new technologies—possibly even new physics—on short horizons. Whether you’re bullish or cautious, the pitch is clear: Grok 4 aims to be not just book-smart, but practically smart, speeding up how people build, analyze, and decide.

OpenAI’s GPT-5 steps up with faster responses, deeper reasoning, and a more natural, reliable feel—bringing expert-level help to coding, writing, learning, and complex problem-solving. The model aims to blend speed with rigor (stronger tool use, longer context, safer completions) and introduces friendlier interactions across text, voice, and visual inputs. Early demos spotlight hands-on coding assistance, interactive learning experiences, and more precise answers to nuanced questions. For teams, GPT-5’s structured outputs and custom tools promise cleaner integrations and better guardrails. (Summary based on the linked video; not official guidance.)