According to xAI's data, Grok 4 and Grok 4 Heavy essentially beat all other models, including OpenAI's o3, Google's Gemini 2.5 Pro, and Claude 4 Opus in various common AI benchmarks, though as one Redditor noticed, the competitors have been chosen selectively, likely to make Grok look better.

Elon Musk unveiled the newest edition of xAI's flagship AI model, Grok, late Wednesday night in a livestream video that touted Grok 4's prowess at topping benchmark scores.Why it matters: xAI is in an accelerating race with OpenAI,

AI, led by Elon Musk, launches its latest AI model Grok 4 with a premium $300 subscription plan. Despite past controversies, the new release sets high expectations.

Grok 4 AI model launches with major upgrades; Elon Musk predicts it could invent new technologies and discover physics by 2026.

The new hires are joining OpenAI’s scaling team, according to an internal Slack message sent by cofounder Greg Brockman.

After months of backlash over alleged pollution concerns, xAI has finally secured an air permit covering some of the methane gas turbines powering its Colossus supercomputer data center in Memphis, Tennessee.

Elon Musk's plans to ship an overseas power plant to Memphis for an xAI supercomputer raise both interest and environmental concerns.

The release comes months after the AI startup launched its previous iteration, suggesting an ongoing lightning pace of AI development.