xAI: AI models, benchmarks & research

xAI is an AI research organization that develops large language models and other AI systems. They have released 30 models across 0 model families.

xAI maintains RealWorldQA. The Benchmarks tab shows each one with its rating (whether it counts toward the LLM Stats Score, a category index, or is listed only) and the number of models scored.

xAI has released 30 AI models tracked on LLM Stats. See the Models tab for the full catalog with technical specifications, benchmark scores, and pricing.

xAI's models have been evaluated on 80 benchmarks. Their top-performing model is Grok-4 Heavy on AIME 2025 with a score of 1.0. See the Benchmarks tab for the full breakdown.

xAI's most affordable model is Grok-4.1 Fast Non-Reasoning with input pricing from $0.20 per 1M tokens via commercial API providers. 9 of their models have public pricing. See the Pricing tab for the full comparison.

xAI has been releasing AI models since March 2024. Their latest release was in October 2026. See the Timeline tab for the full release history.

Visit https://x.ai for official documentation and API access. Many of xAI's models are also available through third-party API providers — check the Pricing tab to compare pricing across providers.