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Grok-3 was released February 17, 2025. Trained on xAI's Colossus supercluster (100,000 Nvidia H100 GPUs). Scored 80% on GPQA Diamond and 95% on MATH. Featured a "think" mode for chain-of-thought reasoning. Available via the xAI API and X platform. Priced at \$3/\$15 per million tokens.