xAI released Grok 4.7 on September 21, 2026, after repeated timeline slips from earlier targets, establishing it as the current flagship with 2.1 trillion parameters focused on coding, long-running agents, and knowledge work at competitive pricing. Elon Musk stated in mid-September that Grok 4.8, a 2.5-trillion-parameter model using a new C++ training stack, was finishing pre-training and beginning reinforcement learning, with trader attention now centered on whether xAI can maintain its accelerated cadence into October amid benchmarks where it trails leaders like Claude Fable 5.1 on agentic tasks. Key upcoming catalysts include potential 4.8 announcements, further integrations with X and enterprise tools, and competitive responses from OpenAI and Anthropic that could shift release priorities.