xAI and the AI unit, by the numbers
In artificial intelligence (AI), scale is the moat. The Colossus supercomputer, the funding, and the valuation marks behind the AI unit.
200K
Colossus graphics processing unit (GPU) count, company reported milestones
$230.0B
xAI valuation marks, Grokipedia figures
Compute and capital
Everything on this page is free. Figures trace to primary filings and official statements, with long histories cross-checked against aggregated SEC data. Values not reported by the company are labeled as estimates in the source data.
Data sources (31)
- Index of official xAI announcements with dates for every model and product release used in the events list
- Series B funding round of 6 billion dollars, May 26, 2024
- Series C funding round of 6 billion dollars, Dec 23, 2024, plus Colossus details: 100,000 H100 GPUs, 122 day build, plan to double to 200,000
- Series E funding round of 20 billion dollars, Jan 6, 2026, over one million H100 GPU equivalents at the end of 2025, approximately 600 million monthly active users across X and Grok apps, Grok 5 in training
- Colossus build timeline: 122 days to first power, doubled in 92 days, full scale at 200,000 GPUs in February 2025, roadmap to 1 million GPUs
- SpaceX acquired xAI, announced Feb 2, 2026
- Grok-1 announcement, Nov 3, 2023
- Open release of Grok-1 weights, Mar 17, 2024
- Grok-1.5 announcement, Mar 28, 2024
- Grok-1.5 Vision preview, Apr 12, 2024
- Grok-2 beta release, Aug 13, 2024
- Grok opened to everyone on X, Dec 12, 2024
- Grok 3 beta, Feb 19, 2025
- Grok 4 release, Jul 9, 2025
- Grok Code Fast 1 release, Aug 28, 2025
- Grok 4 Fast release, Sep 19, 2025
- Grok 4.1 release, Nov 17, 2025
- Grok 4.1 Fast release, Nov 19, 2025
- Grok Imagine 1.5 preview, Jun 3, 2026
- Elon Musk post, Sep 2, 2024: Colossus 100,000 H100 cluster online, built in 122 days, verified this session via the X syndication endpoint
- Elon Musk post, Mar 28, 2025: xAI acquires X, combination values xAI at 80 billion dollars and X at 33 billion dollars, verified via the X syndication endpoint
- Elon Musk post, Aug 22, 2025: MACROHARD announced as a purely AI software company, verified via the X syndication endpoint
- Elon Musk post, Oct 12, 2025: MACROHARD scope statement, verified via the X syndication endpoint
- Elon Musk post, Sep 17, 2025: Colossus II introduced as the first gigawatt AI training cluster, verified via the X syndication endpoint
- Elon Musk post, Jan 17, 2026: Colossus 2 operational at one gigawatt with a 1.5 gigawatt upgrade stated for April, verified via the X syndication endpoint
- Elon Musk post, Mar 11, 2026: MACROHARD or Digital Optimus described as a joint xAI and Tesla project, verified via the X syndication endpoint
- Elon Musk post, Mar 14, 2026: TERAFAB project launch teaser, verified via the X syndication endpoint
- Elon Musk post, Mar 21, 2026: formal TERAFAB announcement, joint SpaceX and Tesla project targeting over a terawatt of compute per year, about 80 percent for space and 20 percent for the ground, verified via the X syndication endpoint
- Grokipedia xAI page: post money valuations for Series B, C, and E, the September 2025 valuation mark, and corporate timeline detail
- Grokipedia Colossus page: approximately 555,000 GPUs and about 2 gigawatts by February 2026, expansion phases, and the Southaven MACROHARDRR facility
- Grokipedia Macrohard page: trademark filed Aug 1, 2025, public reveal Aug 22, 2025, AI agent swarm concept
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