Model family
Grok
Family overview — summarizes releases; licenses and availability belong to each release.
Maintained by xAI (SpaceXAI)23
Grok is xAI's family of large language models, first launched in November 2023 and offered mainly through the Grok assistant and the xAI API. xAI has published weights for two earlier models: Grok-1 in March 2024 and Grok 2 in August 2025. SpaceX's prospectus describes current Grok models as proprietary.1245
- Model hub: xAI on Hugging Face (external site: huggingface.co)
- Repository: Grok-1 repository (external site: github.com)
Last reviewedEntry updated Documented release
Releases assessed
Each release is assessed on its own. This family has no family-wide openness label.
Organization context
U.S. eligibility
Project eligibility rests on documented governing or maintaining entities, not on contributors.
Eligible · basis: U.S. headquarters
Developed by xAI, whose AI operations are headquartered in Palo Alto, California, according to the June 2026 prospectus of its parent, Space Exploration Technologies Corp., a Texas corporation.1
Sources
This listing is not an endorsement, a safety assessment, or a federal approval.