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94 people, organisations and other records · 122 relationships · 34 claims about a valueEverything recorded up to the chosen year, whether or not still in effect · Undated records included
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xAI uses infrastructure ↓ Colossus
xAI reported using its 200,000-GPU Colossus cluster for Grok 4 reinforcement-learning training. Copy claim link
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Machine-checked, not reviewed by an editor Stated in source Supported
Supporting evidence: primary · 1 source
Date 2025-07-09 · snapshot Transaction type infrastructure use Relationship context external Stage operational Quantity exact · 200,000 GPUs in Colossus Scope and limits Company-reported use and cluster size; no independent performance, ownership or precise GPU-generation split inferred. Not a claim that training began on the publication date.
The evidence 01 primary source Supports the claim
Grok 4 ↗ xAI · 2025-07-09
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Paraphrase Grok 4 reinforcement learning used the 200,000-GPU Colossus cluster.
Location in source Scaling Up Reinforcement Learning, second paragraph
Machine-checked · 2026-09-19
Source details and check notes Authors xAI Version Dated xAI launch announcement; current site branding is SpaceXAI. Only the historical Colossus training passage is used. Canonical address Open the canonical source ↗ Accessed 2026-09-19 Language English (en) Attribution xAI, Grok 4 (2025-07-09). Reuse No open redistribution licence asserted. Bibliographic metadata and editorial paraphrases only; no full source redistributed. Check notes Exact cited source passage inspected by a machine agent. Company statements are not independent proof of implementation. Human source review pending. Status and meaning Editorial status. Not reviewed by an editor . An exploratory record that no editor has accepted. This status does not say whether a person has read any linked passage. Each evidence record above shows how it was checked.
Relation. Use of a named compute asset at the documented date. Does not establish ownership.
Date. State reported at this date; no exact start, completion date or current continuity inferred.
Record ID xai-colossus-grok4-2025