xAI launched Grok-3, trained on its Colossus supercomputer with roughly ten times the compute of Grok-2. The release added 'Think' reasoning mode and DeepSearch, an agentic research tool that scours the web and X.

Musk called Grok-3 the smartest AI on Earth at launch, and early benchmarks put it at or near the frontier on math, science, and coding. The release event was streamed live with xAI engineers demoing the model.

Grok-3's compute-heavy approach validated xAI's bet on scaling infrastructure fast, and it became the base for the Grok-4 generation later in 2025.