Grok 3 is a large language model from xAI focused on strong step-by-step reasoning, math, and coding while still acting as a capable general assistant. It was trained with substantial reinforcement learning to support longer chains of thought, use tools, and draw on web search for grounded answers across a wide context window. Day-to-day it provides solidly helpful explanations, emotionally aware dialogue, and reliable instruction following, though its creativity and overall quality reflect an earlier generation of the Grok family compared with more modern systems.