xAI CEO Elon Musk said on September 14, 2026, that the company’s forthcoming Grok 5 model will be its first system to achieve artificial general intelligence (AGI), meaning AI capable of performing at or above human levels across diverse cognitive tasks. Grok 4.8, which has 2.5 trillion parameters, is expected to complete foundational training this week on xAI’s new internal C++ infrastructure before entering reinforcement learning. Musk said current Grok 4.7 performance matches Anthropic’s Opus 5.0 in overall capability, while the article later describes it as comparable to Opus 5, with different strengths. Grok 4.9 is intended to reach performance associated with Astra or Fable. Musk also endorsed safety-focused comments from Anthropic’s Dario Amodei and OpenAI’s Sam Altman, even as he predicted rapid AGI progress. Nvidia shares fell 3.46% and AMD dropped 6.24% as investors reassessed AI-chip demand amid renewed safety concerns and proposals for slower development. The feasibility of Grok 5 achieving true AGI remains speculative because no organization has demonstrated human-equivalent performance across the full range of cognitive tasks.