xAI

xAI is the AI lab that builds the Grok family of language models. Its own timeline dates its company announcement to July 12, 2023, and its announcement of Grok to November 3, 2023.¹ In March 2024 it released the weights of Grok-1, a 314-billion-parameter mixture-of-experts model, under the Apache 2.0 license.² On February 2, 2026, xAI posted that SpaceX had acquired it; its website now carries a "© 2026 SpaceXAI LLC" notice and lists offices in Palo Alto, Seattle, Memphis and London, and Epoch AI files its data centers under the owner name SpaceXAI.^3,1,4 Its current flagship is Grok 4.7, released September 21, 2026, which its API documentation lists with a 500K-token context window.⁵

Its largest figures on MetaPrompt are in compute. In Largest AI Data Centers by Estimated Power Draw (October 2026), Colossus 2 in Memphis ranks first at an estimated 946 MW of IT power in operation, and Colossus 1 ranks 10th at 340 MW; both are Epoch AI estimates.^4,6 The US Commerce Department's July 2026 rule on exports to the United Arab Emirates names X.AI LLC among the eight US-headquartered companies in a new supplement no. 8 to part 740, as How US AI Chip Export Controls Work (as of October 2026) explains.⁷

On the model side, ARC Prize measured Grok 4.6 at 2.11% and Grok 4.7 at 1.82% on ARC-AGI-3's Semi-Private set with its Standard harness, 7th and 8th in Highest ARC-AGI-3 Scores, by Model (Standard Harness).^8,9 xAI's price list puts Grok 4.7 at $2.00 input and $6.00 output per 1M tokens and keeps Grok 4.3 at $1.25 and $2.50, 14th and 9th in Cheapest LLM APIs per 1M Output Tokens (October 2026).¹⁰ Its Imagine API documentation lists video generation of up to 15 seconds per clip, with native 1080p and lip-synced speech on Grok Imagine Video 1.5, covered in How AI Video Generation Works: Clip Length, Resolution and Audio by Model.¹¹