Grok 3 arrived on 19 February 2025 as the first showcase of Colossus, the Memphis supercluster xAI had assembled in months rather than years. The company said the model used ten times the compute of its predecessors and shipped a full family at once: a standard model, a cost-efficient mini, Think variants that spend longer before answering, and DeepSearch, xAI's first agent with web access and a code interpreter. The announced context window was a million tokens, eight times the previous generation. The model is no longer offered in xAI's API catalogue; no shutdown date was ever announced.