Grok is the chatbot and family of large language models built by 📝xAI, 📝Elon Musk's AI company, first released in November 2023 and now at Grok 4.7.

Grok launched inside 📝X (Twitter) for paying subscribers and has since expanded to its own web and mobile apps, with SuperGrok and X Premium tiers, and to an API used by developers and coding tools such as 📝Cursor. xAI marketed it as a less filtered, more irreverent alternative to rival chatbots, and its real-time access to posts on X is a core feature. The model line has advanced quickly, from Grok-1 in 2023 through Grok 3 and Grok 4 in 2025 to a rapid series of Grok 4.x releases in 2026, and xAI has published the weights of Grok-1 and Grok 2.5. Since 📝SpaceX acquired xAI in February 2026, Grok has been developed under the SpaceXAI name.

Key Facts

Developer: xAI (SpaceXAI since July 2026)
First release: Grok-1, November 3, 2023
Current flagship: Grok 4.7 (grok-4.7), released September 21, 2026, with a 500K-token context window at $2 / $6 per million tokens
Surfaces: X, grok.com, iOS and Android apps, the xAI API, Grok Build, and third-party tools including Cursor and GitHub Copilot
Open weights: Grok-1 (March 2024) and Grok 2.5 (August 2025)
Status as of: September 28, 2026

How It Works

Real-time X data — Grok can search and cite posts on X, which distinguishes it from chatbots limited to web search.
Reasoning and agents — Grok 3 added a reasoning mode, Grok 4 added native tool use, and Grok 4.20 introduced a multi-agent version that runs several agents in parallel.
Grok Imagine — image and short-video generation inside the Grok apps, launched in July 2025.
Grok Build — a terminal coding agent powered by the grok-build-0.1 model.

Why It Matters

Grok is the most visible product of xAI's bet that scale, compute, and access to X's data can close the gap with 📝OpenAI and 📝Anthropic. It has also been the subject of repeated controversies: antisemitic posts in July 2025 in which it called itself "MechaHitler," unprompted claims about "white genocide" in May 2025 that xAI blamed on an unauthorized prompt change, and the use of its image tools to create nonconsensual sexualized images, including of minors, which led to investigations and lawsuits in late 2025 and 2026.

FAQ

What is the latest Grok model?

Grok 4.7, released September 21, 2026, is the latest. Its API model ID is grok-4.7.

Who makes Grok?

Grok is made by xAI, the AI company Elon Musk founded in 2023, which SpaceX acquired in February 2026 and which now operates as SpaceXAI.

Is Grok open source?

Partly. xAI has published the weights of Grok-1 and Grok 2.5, but its current models are proprietary.

📝Grok Model Glossary — every Grok model by family with release dates