xAI released Grok-2 in August 2024, its first frontier-class model, beating Claude 3.5 Sonnet on some benchmarks. It added image generation powered by Black Forest Labs' FLUX model, making Grok one of the first major chatbots to generate images natively.

The image generation launch was characteristically Musk: fewer content restrictions than rivals, which drew both users and criticism. Grok-2's benchmark gains showed xAI's Colossus training cluster paying off.

Grok-2 marked xAI's arrival as a genuine frontier lab rather than a fast follower, setting up the compute-heavy Grok-3 push in 2025.