AI Lab Profile · United States
xAI
xAI is independent AI lab (merged with X Corp in 2025), founded in 2023 and headquartered in Palo Alto, California, USA. Grok models integrated with X; Musk-founded; Colossus-scale compute.
Founded 2023 · Palo Alto, California, USA · x.ai · Financials: Epoch AI (as of 2026-10-05) · Updated 2026-10-05
Overview
To understand the true nature of the universe.
Founded in 2023 by Elon Musk with a team of researchers recruited from DeepMind, OpenAI, Google and other labs.
Companies building products on xAI's models can compare generative AI consultancies and AI agent development companies that integrate them into production systems.
Flagship AI models
Key models released by xAI, most recent last. Dates are the public release month where confirmed.
- 2023-11 Grok-1First Grok model; weights later open-sourced under Apache 2.0
- 2025-02 Grok-3Trained on the Colossus supercomputer
- 2025-07 Grok 4Reasoning-focused frontier release
- 2026-07 Grok 4.5Latest release; positioned as a top-tier coding and agent model
Funding & financials
Quantitative figures from Epoch AI's Data on AI Companies (CC BY 4.0). Each is the latest dated figure Epoch holds; private labs disclose selectively, so undisclosed values are marked as such — never estimated.
| Total equity funding | $37.0bn | |
| Latest valuation | $230.0bn | as of 2026-01-06 |
| Est. annualised revenue | $428m | as of 2025-09-30 |
| Staff | 300 | as of 2025-03-12 |
| Active users | 64m | |
| Revenue / employee | $1m |
Key facts
- In March 2025 xAI acquired X (formerly Twitter) in an all-stock deal, combining the two companies under xAI Holdings.
- Operates the 'Colossus' supercomputer cluster in Memphis, Tennessee, built around 100,000+ GPUs.
- Open-sourced the Grok-1 base model weights (Apache 2.0) in March 2024.
- Grok is tightly integrated into the X social platform as its native assistant.
Frequently asked
- When was xAI founded?
- xAI was founded in 2023, by Elon Musk. It is headquartered in Palo Alto, California, USA.
- How much funding has xAI raised?
- xAI has raised about $37.0bn in total equity funding, at a latest valuation of about $230.0bn (2026-01-06). Source: Epoch AI.
- What are xAI's main AI models?
- xAI's notable models include Grok-3, Grok 4, Grok 4.5. Grok models integrated with X; Musk-founded; Colossus-scale compute.
Sources
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